Tag: dave

More Scrap Tires Reused

  • A variety of products using crumb rubber, which is manufactured from scrap tires. (Photo courtesy of Liberty Tire)

Americans get rid of almost 300 million scrap tires every year.
Historically, a lot of used tires have ended up at the bottom of
ravines or in huge tire piles. These piles have created eyesores,
toxic fire traps and places for mosquitoes to breed. But Ann Murray
reports that the days of widespread illegal dumping and monster tire
piles are waning:

Transcript

Americans get rid of almost 300 million scrap tires every year.
Historically, a lot of used tires have ended up at the bottom of
ravines or in huge tire piles. These piles have created eyesores,
toxic fire traps and places for mosquitoes to breed. But Ann Murray
reports that the days of widespread illegal dumping and monster tire
piles are waning:


Michelle Dunn is making her way through shoulder high knotweed to
show me an urban tire dump:


“This is the start of the tires. They’re all entwined in here.”


About 300 tires have been chucked over the hill in this quiet
Pittsburgh neighborhood. Dunn’s with a non-profit that helps
communities clean up old dump sites. She says illegal tire dumping is
still a problem but not the gargantuan problem it used to be:


“I don’t think you’re seeing new major piles appearing. The regular
Joe isn’t dumping as many tires because people are now becoming
educated. They have a service they can take their tires to have them
disposed of properly.”


In many states, the place to take old tires is now the neighborhood
tire store. Since the early 1990s, about 35 states have required tire
dealers to collect small fees to dispose of used tires. Now fewer
people dump tires and about 4 out of 5 scrap tires have been
cleaned up. Numbers have nosedived from a billion stockpiled tires to
less than 200 million.


Not all states have had equal success reducing their cache of old
tires. Some states such as Alaska, Wyoming and Nevada are still
struggling. Their rural landscapes have made it hard to catch illegal
dumpers and collect tires. Many other states have stepped up
enforcement. They now make dumpers pay to clean up waste tire
sites and register scrap tire haulers. But Matt Hale says new laws
aren’t the only reason scrap tire programs are working. Hale directs
the division of solid waste for the US Environmental Protection
Agency:


“In many cases a successful program is the result of being near
markets for tires. In the southeast for example, tires are in demand as
a fuel use and that certainly makes state tire programs in that part of
the country easier.”


Stricter waste tire laws have made it easier for the tire
recycling industry to take hold. Dave Quarterson is a senior director
with Liberty Tire. Liberty’s the biggest tire recycling company in the
country:


“It has been difficult for companies like ours in the past to look at
having to invest 5 or 10 million dollars into a facility to recycle tires
and then to have to compete on the street with a guy with a $1000
pickup truck who’s rolling ’em down an embankment somewhere.”


In 1990, very few of the 300 million scrap tires generated each year
were re-used. Today about 90 percent are recycled. A majority of
these tires are chipped and shipped to cement kilns and paper mills
to be burned for fuel. A fuel source that US EPA says is relatively
safer than burning coal but environmental groups say is still polluting.


Tire recyclers like Liberty Tire are now in big demand. Liberty uses
almost 75 million scrap tires a year. Their headquarters
plant specializes in making “crumb” rubber. Crumb’s used in
everything from football field turf to brake lining. It’s made from
shredded tires that are frozen with liquid nitrogen and then pulverized
into various sized bits.


Dave Quarterson, says tire recyclers are starting to move away from
producing tire chips for fuel to making newer products like crumb
rubber:


“We’ve got a lot more money into producing it but it’s a lot more
rewarding financially.”


States are also encouraging new uses for the decades old tires that
still remain in big, abandoned piles. Even with this backlog of old
scrap tires, states and recyclers are optimistic that growing markets
and new laws mean more and more scrap tires will have a useful
second life.


For the Environment Report, this is Ann Murray.

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Fish Stocking Taxing

  • As fewer Brown Trout from a state stocking program survive in the waters of Thunder Bay in Lake Huron, the fish takes on the allure of a trophy fish, especially since those that do survive can grow very large. Last year, a 28 pound Brown Trout won the tournament. It may be the biggest Brown ever to be caught in the state of Michigan. (Photo by Linda Stephan)

Most cities have their symbols. Imagine San Francisco without
the Golden Gate, New York without the Statue of Liberty, or
Miami without dolphins. Linda Stephan has the story of a
community that has linked itself with a fish that is not native to
its waters. And stocking that fish is costing taxpayers a lot:

Transcript

Most cities have their symbols. Imagine San Francisco without
the Golden Gate, New York without the Statue of Liberty, or
Miami without dolphins. Linda Stephan has the story of a
community that has linked itself with a fish that is not native to
its waters. And stocking that fish is costing taxpayers a lot:


The brown trout arrived in Lake Huron’s Thunder Bay by a
fluke. Back in the 1970s, about a thousand fish – surplus stocks
from inland waters – were simply tossed out into the bay by
biologists, as if the bay were a trash bin.


No one expected them to survive. They thought they’d just be
food for other fish. But the brown trout did survive. They
quickly grew large and feisty. The state started to stock these
waters with young brown trout every year because anglers
liked catching them.


In fact, it was so popular, they named a fishing tournament after
it: the brown trout Festival in Alpena, Michigan. This year, a
crowd of hundreds gathered, despite periodic rain showers, as
festival o-“FISH”-als weighed in a day’s catch… lake trout, walleye:


(Sound of announcer at tournament)


You don’t need a brown trout to win at the brown trout
Festival. And it’s a good thing because these days, most boats
don’t catch even one. That’s because things have changed.


The ecosystems of Lake Huron and the other Great Lakes are
changing rapidly, as foreign invasive species, such as the zebra and
quagga mussels, steal away food at the bottom of the lake’s
food web.


Plus, a migratory bird that’s been showing up in this bay in huge
numbers, cormorants, have been eating the small browns
stocked by state fish nurseries before the fish ever make it into
open waters.


For the past decade, the Brown hasn’t survived all that well in
Lake Huron. So today biologists estimate that, taking into
account all those fish that don’t survive, every time an angler
catches a big Brownie, it now costs taxpayers close to
three hundred dollars.


In other words, each brown trout caught represents about
three hundred dollars spent by the state stocking program.
Even though the brown trout is not native, people here say the
fish belongs in these waters.


Hobbyist Dick Cadarette at the brown trout Festival says the Brown has a special allure for
the angler:


“Well, because they’re the best eating and they’re the hardest to
catch. That’s why we call it the brown trout because anybody
can catch a steelhead – I mean a lake trout – but they can’t
everybody catch a Brown.”


As the large fish becomes more and more elusive, it takes on
the allure of a trophy fish.


Fisheries Biologist Dave Fielder says because of the cost – for
years now – the state has had good reason to quit stocking these
waters with brown trout, but they still haven’t. No one’s
willing to see the namesake of the brown trout Festival
disappear:


“What’s always amazed me is how the natural resources in
Michigan, including the fisheries that we enjoy in the Great
Lakes, is really a part of that local heritage and quality of
life for these local communities and becomes an important part of the local existance and indentity it’s important that we
as scientists don’t lose sight of that.”


But some say the fact that the local community has gotten used
to seeing the brown trout does not mean it belongs in the lake.
Mark Ebener is a Fisheries Biologist for the Chippewa-Ottawa
Resource Authority. It regulates fishing for five Native
American tribes:


“You tell a lie long enough and sooner or later people
believe it and accept it as the truth. You know it’s not that
brown trout belong here. brown trout were introduced
and they continue to be defined as an introduced species
into North America.”


Ebener says since the brown trout does no harm to native fish,
such as the lake trout, his organization doesn’t oppose the
stocking program. But he also says at the current cost, the
brown trout is a clear waste of taxpayer money.


Back in Alpena, Biologist Dave Fielder agrees the state can’t
keep stocking the lake with browns if so few continue to
survive. But, an angler himself, he looks with envy on a
mounted brown that took last year’s top prize in the tournament,
an unbelievable 28.2 pounds:


“Can you imagine landin’ that fish? That must have been
somethin’. Anybody’s who’s caught fish can look at that and imagine the battle they must’ve went through and the excitement they must’ve felt. And those are real feelings and that’s not to be
trivialized.”


That’s evidence to Fielder, and others who fish these waters,
that at least some brown trout have what it takes to complete
for food in the changing ecosystems of Lake Huron.


For the Environment Report, I’m Linda Stephan.

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Green Grows the Grave

More people are planning a so-called green burial when they die . Some want to
be laid to rest in a more natural setting called a conservation cemetery. Chuck
Quirmbach reports:

Transcript

More people are planning a so-called green burial when they die . Some want to
be laid to rest in a more natural setting called a conservation cemetery. Chuck
Quirmbach reports:


Green burials don’t use environmentally harmful chemicals to preserve the body
and avoid elaborate caskets or concrete burial vaults. In a few cities around the
US, the burials take place in conservation cemeteries. Those sites don’t mow
the grass or use lawn chemicals, and have grave markers that fit in with the
landscape.


Dave Drapac is with the Trust for Natural Legacies. He says despite the non-traditional process, green
burials are not a threat to public health:


“You know, if the person had a disease when they died, you’re gonna have to
take precautions, but you’d have to do that either way… and then the other issue with
burial, you have to make sure the cemetery is sited properly, just like any
cemetery does now, not near groundwater.”


Some funeral directors already offer a more environmentally-sensitive burial at
traditional graveyards.


For the Environment Report, I’m Chuck Quirmbach

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Straining Water Supplies in the Southwest

  • Nancy and Dave Tom bought this home near Apache Junction, Arizona. They have to haul all the water they use with their pickup truck, so they quickly learned how to conserve. (Photo by Mark Brush)

Many areas in the Southwest are booming. With all this new
development, pressures on water supplies are growing. Mark Brush takes
a look at the lengths people go to, to get water in the desert:

Transcript

Many areas in the Southwest are booming. With all this new
development, pressures on water supplies are growing. Mark Brush takes
a look at the lengths people go to, to get water in the desert:


Nancy and Dave Tom used to get their water from a city water supply.
That was back when they owned a home in Tempe, Arizona. Like a lot of
people in the area, they had a pool, plants that needed water year
round, and a green lawn out back. Not exactly a desert scene. It took
a lot of water to support their lifestyle.


But life in Tempe was getting crowded. And when somebody rang their
doorbell and offered to buy their house for almost twice what they paid for
it, they jumped at the chance to move to a smaller town.


(Sound of birds)


They found a house for sale just outside of Apache Junction. It’s a
small city in the desert about an hour’s drive from Phoenix. The house
is at the foot of a dry mountain range and has spectacular views. But
the house didn’t have city water service:


“When we saw this piece of property we pretty much fell in love with it
immediately. And it was stated in the multiple listings that you did
have to haul water. And that the water trailer conveyed with the
property (laughs).”


(Sound of hooking up the truck)


To get their water, Dave Tom hooks up a trailer with a big plastic
water tank. He tows the trailer about 4 miles into Apache Junction.
There’s a water filling station here. He gets about 90 gallons of
water for each quarter dropped into the machine:


(Sound of truck parking)


“I’ve got my four quarters here – we’re going to put it in the vending
machine and have at it.”


(Sound of quarter and water rushing)


He makes about two trips a week, so he figures they’re using about 600
gallons of water a week. That’s quite a bit less than the 6000 gallons
they were using in Tempe.


Some of the things they did to cut back were obvious. Since they no
longer had a pool – and they didn’t water a green lawn – that helped.
But in their new place, they also bought a high efficiency washer and
dishwasher. And, when they don’t have guests around, they cut down on
the number of times they flush the toilet.


And they’re not alone in trying to cut back on water use. Even their
neighbors who have a well are really careful with their water. Phil
Reinhart lives just up the road. He’s rigged up a system of gutters
and pipes to catch rain water:


“You see it drains the front of my house and it comes down these
gutters into these storage barrels. And then I have a little pump that
I use and a little twelve volt battery that I use to pump my washing
machine full and then my washing machine then discharges into my citrus
trees – this is a lemon – here, take a lemon back with you.”


Reinhart is careful with his water. And he’s worried that the
population boom will put a strain on his well.


(Sound of water)


The tank on David Tom’s trailer is full. He tries to shut the water
off:


“Alright we’ll push the shutoff button – and watch out, you’re going to
get wet… no the shutoff isn’t working. We’re going to dump 25 to 30, maybe 40,
gallons of water, which to me it’s a shame they need to come down and
fix this.”


(Sound of water flowing)


A lot of this water spilling onto the ground has traveled a long way to
get here. The Central Arizona Project pumps water from the Colorado
River 230 miles away.


“Rather than a river than runs downhill by gravity, we’re a river that
runs uphill by pumps. We’re the largest electric consumer in the state
of Arizona.”


Sid Wilson is the general manager of the Central Arizona Project. He
says most of the water pumped into this region is used for farming.
But with rapid development, that’s expected to change. More water will
be used to service the new homes sprawling out into the desert.


“The CAP right now provides 40% of the water to this area, 40%, and that will increase
some over time.”


Wilson says people are going to continue to move to the Southwest. So,
future water supplies will have to be developed.


Back at their home near Apache Junction, Dave Tom has finished filling
up their underground storage tank. It’s taken him two trips with the
trailer.


(Sound of gurgling)


His wife Nancy says their new home has changed the way they think:


“Life out here in the desert has given me a greater appreciation for
water. There’s a part of me that says this is how everybody should
live in the desert. That they should have that awareness of their
water usage and embrace the fact that you live in the desert rather
than trying to change it into a lush tropical paradise.”


For the Environment Report, I’m Mark Brush.

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Invasive Die-Off Stirs Fishery Debate

  • A naturally reproduced wild lake trout fingerling. (Photo courtesy of MI DNR.)

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:

Transcript

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But, some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:


When we started digging canals, connecting the lakes to the Atlantic Ocean, things changed a lot for the fish in the Great Lakes.


First, the sea lamprey got into the lakes through the Welland canal that bypasses Niagara Falls.


The lamprey is an eel-like parasite that nearly wiped out the big fish in the Great Lakes by attaching to them and sucking the life out of them.

Also slipping through the canals was a smaller fish, the alewife. Since the lamprey wiped out most of the predator fish in the lakes, the alewife population exploded. They out-competed native fish for food. It got so bad, that by the mid 1960s, if you weighed all the fish in Lake Michigan, more than 80% of the weight would have been alewives.


So, once wildlife managers got the sea lamprey under control, they had to figure out what they could do to get alewives under control. The fish biologists decided to introduce new predators, trout and salmon, to prey on the alewives. These fish were not native to the Great Lakes. Expensive nurseries were built by federal and state game agencies to keep supplying new trout and salmon every year to prey on alewives.


Forty years later, in Lake Huron, the alewife population collapsed, and in Lake Michigan alewives are declining rapidly. Mission accomplished, right?


Well, in that 40 years, a whole recreational fishing industry has grown up around fishing for those introduced trout and salmon. Some fishery managers now say we have to find a balance of the right amount of alewives to sustain the introduced trout and salmon fishery. So, recently states have cut their trout and salmon stocking programs to give alewives a chance to recover.


Tom Trudeau [who] operates a fish nursery for the state of Illinois says it would cause trouble to try to take the Great Lakes back to native fish only.


“We do have this industry that we have pressure to keep. You know, you’re putting a lot of people out of business if you get rid of it.”


And Trudeau says because of ecological damage, many of the smaller native fish on which big predators used to feed have been wiped out.


“So, I mean, of the six or seven species in that category, we only have one. And a couple of them are extinct. So, I mean, we could talk about going back to the ideal situation of pure native species, but we’ve disrupted the habitat so much.”


So, the argument goes, the invasive alewives are now needed. But something unexpected happened when the alewives disappeared from Lake Huron. The native fish, walleye, yellow perch, and lake trout started doing better.


Dave Fielder is a fisheries research biologist with the Michigan Department of Natural Resources.


“We’ve long known that adult alewives were a predator and a competitor on newly hatched perch and walleye fry. We just didn’t realize how substantial that effect was until finally the adult alewives were removed from the system and now we’re enjoying some greatly increased reproductive success. Walleye, particularly in Saginaw bay, are at some of the highest levels that we’ve seen in a long time.”


But, after 40 years, people are used to fishing for those introduced trout and salmon. And some fisheries managers are wondering what will happen to all those expensive nurseries that provide their jobs.


What happens to all of those charter boat fishing operations, fishing tourism, if the government were to stop stocking those trout and salmon? Would they switch to fishing for native fish? And, can the native fish even survive in the long-run since so many of the smaller native prey-fish are no longer around?


Dave Fielder says it’s hard to say.


“So, we’re kind of in the middle of a change – it’s really a paradigm shift in many ways – and that’s always scary because nobody really knows how we’re going to end up, but I prefer to be optimistic. I think there are a lot of reasons to be hopeful in regards to the benefits that we’re seeing for our native species.”


But some fisheries managers say the debate of whether to go all native or to try to find the right mix of native and non-native fish is not over. Since invasive species, pollution, and habitat destruction have changed the Great Lakes so much, wildlife managers think they’ll still have to keep stocking one kind of fish or another to keep the recreational fishing industry going. If that’s the case, does it matter whether it’s native fish, or the introduced fish that anglers have grown to like so much?


For the Environment Report, this is Lester Graham.

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New Power Plant Makes Light Out of Leftovers

With ongoing concerns about over-reliance on fossil fuels, researchers and entrepreneurs are looking for alternate ways to generate energy. One university scientist has created a power plant fueled by organic waste, including table scraps from restaurants. Tamara Keith reports:

Transcript

With ongoing concerns about over-reliance on fossil fuels, researchers and entrepreneurs are looking for alternate ways to generate energy. One university scientist has created a power plant fueled by organic waste, including table scraps from restaurants. Tamara Keith reports:


At Boulevard, an upscale restaurant, diners lunch on seared sea scallops, paella and grilled escolar among other options.


Back in the kitchen cooks are careful to keep all food scraps out of the trash.


(Kitchen sounds, scraping sounds)


The food scraps from this restaurant and 2,000 others in the San Francisco Bay Area are already being collected to turn into compost.


But now some of that food, about 8 tons a week, is going to a new biogas power plant at the University of California Davis. Tim Quaintance is a chef at Boulevard. He says he’s pleased that his leftovers aren’t just going to a landfill.


“It’s nice that in the past things that have basically been thrown away are now actually being used, and with this technology really contributing to reducing our reliance on fossil fuels.”


(Generator runs in background)


In Davis, the table scraps are being converted into fuel at an experimental power plant known as the Biogas Energy Project. With its four large steel tanks and 22 kilowatt generator, this plant is the first real-world demonstration of a technique called anaerobic phased solids digestion.


Rayhong Jha is a professor of biological and agricultural engineering at the University of California Davis. She first developed this technology on a smaller scale in her lab.


“What you see here is 20,000 times larger than the reactor system I use for laboratory testing.”


It may sound like something out of a science fiction movie, leftovers into power, but Dave Konwinski says it’s real. He’s CEO of Onsite Power Systems Incorporated which licensed the technology and operates the plant.


“Every ton of collected food waste will provide enough either electrical or thermal energy to run an average of 10 California homes.”


Konwinski sees this test plant as the first step to commercializing biogas power plants. Here’s how it works: the food waste as well as grass clippings and other would-be-trash go into a sealed tank where bacteria break the mush down into water and organic acids… kind of like what happens if you leave lettuce in the fridge too long. When that’s done, the organic acids are pumped into another tank where different bacteria convert the soup into methane gas.


“Biogas can be used to run a generator, we have a generator we’ll be running here, or we can use it in the boiler to offset natural gas heat, and we’re looking at taking the gas and converting it into vehicle fuels.”


The trash and recycling company that serves San Francisco, NorCal Waste Systems, is providing the raw materials. Robert Reed is company’s director of corporate communications.


“This research and other research like this is very important because it could be a double or a triple. What I mean by that is it could produce new energy. It could reduce the amount of material going to landfills. And it could help reduce the creation of greenhouse gasses.”


And Reed says if this technology proves to be commercially viable, the results could be huge. In just California alone, 38 million tons of garbage is sent to landfills each year. He says half of that could be converted to power, and that’s enough energy to continuously power the entire city of San Francisco.


Suddenly leaving a little broccoli on your plate doesn’t seem like such a bad thing.


For the Environment Report, I’m Tamara Keith.

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White Buffalo Brings Legend to Life

  • A statue depicting White Buffalo Calf Woman, holding a sacred pipe atop a white buffalo. (Photo courtesy of Brian Bull)

Small crowds are gathering at a buffalo ranch in Wisconsin. They’re hoping to catch a glimpse of a rare white buffalo. This is the second white buffalo to draw crowds from around the world to the ranch, and as Brian Bull reports, the white buffalo holds special significance to some Native Americans:

Transcript

Small crowds are gathering at a buffalo ranch in Wisconsin. They’re hoping to catch a glimpse of a rare white buffalo. This is the second white buffalo to draw crowds from around the world to the ranch, and as Brian Bull reports, the white buffalo holds special significance to some Native Americans:


Nearly twenty people huddle behind a metal fence, standing tip-toed and pointing cameras towards a hilltop. Rancher Dave Heider drives his Bobcat tractor nearby, dumping hay into pens, as his buffalo herd comes down to eat. Among the lumbering shaggy brown bodies, is a speck of white that excites the crowd.


“There he is, here he is, he’s coming.”


The petite, snow-white calf stays close to his mother. Heider shuts the pen, fielding questions from onlookers, some of them remembering the first white buffalo known as Miracle.


“Is this the same family as Miracle? ‘No Relation.’ What’s the new one’s name? ‘Miracle’s Second Chance.'”


“Miracle’s Second Chance” is luring visitors from as far away as Mexico, Canada, and South America, as well as the immediate region. A biker even sports a white buffalo tattoo on his enormous bicep.


Carrie Singer is an Ojibwe Indian living in Milwaukee. Like others, she’s waited several hours in the rainy weather to glimpse the white buffalo calf.


“I believe it signifies peace and renewal, new beginnings for all our people. These are hard times, times of war, and this is something to have people gravitate towards, that new life, that new beginning.”


Buffalo are traditionally important animals to the Plains and upper Midwestern tribes. They were a vital source for food, tools, and clothing. And Lakota legend speaks of White Buffalo Calf Woman. They say she appeared with the first sacred pipe, to bring spirituality and prosperity to Indian nations.


That spiritual association is what drew Jimmy Kewakundo of Ontario, Canada, to the Heider’s ranch. Kewakundo is of Ojibwe, Potawotami, and Odawa descent. He and several other native people came to sing and honor the calf.


“I’ve brought my bundle and sacred pipe to do a ceremony with my brothers here. It teaches us how to live and to remember the old ways, and the importance of white buffalo calf woman.”


That Miracle’s Second Chance is a different gender than that of the legendary Lakota icon doesn’t phase Kewakundo and friends. And the Heiders say crowds and publicity are good, but nowhere near the levels seen for Miracle when she was born in 1994. Inside their bison-meat gift-shop, Valerie Heider stands near Miracle, who is now stuffed and on display. Heider says she has no guesses yet as to what it means to have several white buffalos born on their ranch.


“The Natives are telling us how blessed we are, and they’re also telling us we are in balance now because we have a male and a female.”


For many, the sheer novelty of a white buffalo is enough to stir people’s interest.


Dave Carter is executive director of the National Bison Association. He says the odds of a white buffalo being born are at least one in two-hundred thousand, though some estimates are as high as one in six-billion. Either way, Carter says it’s an incredible event.


“Particularly with a ranch where it had a fairly closed herd and these are non-related animals. Of course for the Native American folks, this is something that gets into a spiritual level, and so it has some additional significance when it gets to the Native American community.”


Back at the ranch, Indian spiritual leader Jimmy Kewakundo greets Dave Heider and shakes his hand.


“My name’s Jimmy, I come from Ontario, Canada. I want to say thank you for what you’ve done so far, working with Miracle, on behalf of the Ojibwe nation I want to say thank you for everything that you’ve done.”


Heider says more than 500,000 people came by back when Miracle was alive. He adds at times, it’s hard putting up with all the crowds and traffic, but moments like this put it all in perspective.


“It makes you feel good that you’re making some people happy. Valerie and I looked at it when Miracle was born, everybody said ‘why don’t you sell her?’ The money was there, we had many offers. We both felt as though we were giving something back that was given to us. By law and ownership Miracle belonged to us, but she belonged to everybody.”


The Heiders say they’ll eventually put the new white bison with some of Miracle’s daughters and granddaughters, to form a new herd. For now, they’ll weather the crowds with the same reverence, patience, and wit as they have before.


For the Environment Report, I’m Brian Bull.

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Harnessing Energy From Food Scraps

Leftover broccoli, unfinished hamburgers, wilted salad… sounds like a stinky mess… but it also has the potential to generate electricity. A new power plant fired up this week and you won’t find any coal or natural gas fueling its generators. This plant is powered by leftovers. Tamara Keith reports:

Transcript

Leftover broccoli, unfinished hamburgers, wilted salad… sounds like a stinky mess… but it also has the potential to generate electricity. A new power plant fired up this week and you won’t find any coal or natural gas fueling its generators. This plant is powered by leftovers. Tamara Keith reports:


The Biogas Energy Project on the University of California Davis campus is the first real-world demonstration of a new technology that could change the way we think about trash.


Food scraps from San Francisco restaurants are loaded into large sealed tanks where bacteria go to work, converting the food into fertilizer and releasing hydrogen and methane gas. That gas can then be used to fuel cars, or create energy using a generator.


Dave Konwinski is CEO of Onsite Power Systems Incorporated, which operates the plant.


“We’re burying all this organic waste in landfills, but every one ton has enough power to provide the heat for 10 homes, so the numbers are staggering how much energy we can make.”


Konwinski says he hopes to make the trash to power system commercially available early next year.


For the Environment Report, I’m Tamara Keith.

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Trees Under the Influence of Ozone and Co2

  • The circle of trees, as seen from the outside. The white pipe seen near the top delivers either normal air, one, or both of the experimental gasses to the trees. (Photo by Bob Kelleher)

In northern Wisconsin, they’re finding that gasses such as carbon dioxide and ozone will change the makeup of what survives in a future forest. An open air experiment called the Aspen FACE project has been testing trees in elevated levels of ozone and carbon dioxide for ten years. But they don’t know whether the forest can change as quickly as the climate does. The GLRC’s Bob Kelleher has more:

Transcript

In northern Wisconsin, they’re finding that gasses such as carbon dioxide and ozone will
change the makeup of what survives in a future forest. An open air experiment called the
Aspen FACE project has been testing trees in elevated levels of ozone and carbon dioxide
for ten years. But they don’t know whether the forest can change as quickly as the
climate does. The GLRC’s Bob Kelleher reports:


We’re standing inside a circle of trees: paper birch, aspen, and sugar maples, maybe 15
feet high. And they’re surrounded by a ring of large white pipes spraying the trees with
gasses – that’s the high pitched noise.


Among 12 different circles of trees, some get carbon dioxide, or ozone, or a
combination. These are the very gasses believed responsible for changing the climate –
they hold in the earth’s warmth, forcing surface temperatures higher.


Dave Karnosky, with Michigan Technological University, heads the Aspen FACE project,
near Rhinelander, Wisconsin. Karnosky’s trying to predict how these gasses will affect
the northern forest:


“Those species, with aspen and aspen mixed with birch and maple make up a huge
portion of our northern forests, and there was a lot of interest by industry as well as to
what’s going to happen in the future as these greenhouse gasses continue to build up in
the atmosphere.”


Even ten years ago, when this project started, it was clear that carbon dioxide and ozone
levels were on the increase.


Ozone is destructive. It’s bad for people and for plants. Carbon dioxide, on the other
hand, is what we exhale, and what green plants need to grow. Both gasses have been on
the increase, largely due to burning fossil fuels such as in coal-fired power plants and in
cars and trucks. Karnosky says he knew aspen were quite responsive to both CO2 and
ozone:


“We weren’t sure much about the interaction, but we were sure interested in what would
happen with that, because those two pollutants are both increasing at about the same rate
in the atmosphere.”


The Aspen FACE project has shown that most trees grow well when exposed to carbon
dioxide, and most do poorly in ozone. With the gasses combined, bad effects tend to
offset the good ones, but results vary greatly between the different kinds of trees, and
even within a single species of trees, like aspen.


Karnosky has found there’s a tremendous range of genetic variation even among the
relatively few trees they’ve tested. That variation makes clear predictions difficult:


“It’s very tough to make a single prediction for species or individuals within species,
there’s so much genetic variation. So that’s been one of the, I think, kind of the highlights
from what I see in terms of a bit of a surprise for us.”


That genetic variation could be the forest’s salvation. Karnosky thinks that if some
aspens, for example, die off from ozone, maybe others will do okay, and fill the forest
back in. Sugar maples, which seem more tolerant of ozone, could replace some aspen
and birch. Then, the mix of trees in the forest would change, but the forest would
survive.


But, there could be problems if the air changes the forest too quickly. Neil Nelson is a
plant physiologist with the US Forest Service. Nelson says the region’s paper and pulp
industries rely heavily on aspen trees. He’s uncertain how quickly the forest, and forest
industry, can respond if aspen begins to die off – and how long it might take for other
trees to grow in.


“One of my colleagues has said, you know, the key issue may be whether things change
too fast for our society and economy to adjust to, and I think that’s an open question.
There seems to be great plasticity, and we aren’t quite there in terms of predicting from a
forest management standpoint what these results mean.”


It takes time to grow trees, maybe too much time if the climate suddenly shifts. The
Aspen FACE project has already provided regulators preliminary data on ozone. It could
become the basis for future pollution law. But, even ten years into the Aspen Face
project, there’s still a lot more data to harvest among the aspen and hardwoods.


For The GLRC, I’m Bob Kelleher.

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Feral Pigs Take States by Storm

Feral pigs are a big problem in many states, and while many are escapees from farms, some are actually let loose by hunters. The
GLRC’s Brian Bull reports on how the problem is playing out in one area:

Transcript

Feral pigs are a big problem in many states. And while many are escapees
from farms, some are actually let loose by hunters. The GLRC’s Brian Bull
reports on how the problem is playing out in one area:


Feral pigs have appeared in several states including Oregon, California, Indiana, Illinois
and Wisconsin. Recently they started showing up Minnesota. It was first thought wild
swine might’ve crossed frozen waterways from Wisconsin. Wisconsin wildlife biologist
Dave Matheys says the growing problem is more likely due to hunters using pigs for
hunting practice:


“Some bear hunters who train their hounds, train them on
pigs, and don’t recapture the pig. It escapes, or the hounds aren’t
trained thoroughly enough or they just don’t want to recover it, so
the pig or pigs remain out in the wild.”


Feral pigs damage the habitat of ground-nesting birds, kill
small deer, and despite their shy nature, have even attacked people.
Matheys says the wild pigs are prolific, and eat almost anything, making them hard to
monitor and control. In some states wildlife managers have declared an open season on
the pigs.


For the GLRC, I’m Brian Bull.

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