The state legislature in Minnesota is looking at a bill that would restrict phosphorus levels in automatic-dishwashing detergents. Supporters say it would reduce harmful algae blooms in lakes and streams. If the bill passes, it would be the first state to make such restrictions. The Great Lakes Radio Consortium’s Christina Shockley reports:
Transcript
The state legislature in Minnesota is looking at a bill that would restrict phosphorus levels in
automatic-dishwashing detergents. Supporters say it would reduce harmful algae blooms in lakes
and streams. If the bill passes, it would be the first state to make such restrictions. The Great
Lakes Radio Consortium’s Christina Shockley reports:
Phosphorus in detergents helps to clean dishes, but when the mineral ends up in lakes and
streams, it promotes algae blooms. Large algae blooms can kill fish and restrict sunlight to
bottom-rooting plants. In the 1970s, phosphorus was restricted in other types of detergents.
David Mulla is a professor in the soil, water, and climate department at the University of
Minnesota. He says that legislation did make a difference.
“We had a very large reduction in the amount of phosphorus that was being emitted to our waste
water treatment plants as a result.”
However, Mulla says dishwashing detergents are not one of the primary sources of phosphorus in
lakes and streams today. Detergent manufacturers say if they don’t use phosphorus, their
detergents might not meet some health standards. They also say a reduction won’t have any
environmental benefits. The bill is currently being discussed in the state legislature.
For the Great Lakes Radio Consortium, I’m Christina Shockley.
Low prices for corn and soybeans have led many Midwest farmers to look for a new crop to mix with their usual rotation. Some are turning to plants grown specifically for what’s called “biomass.” Biomass crops can be used as fuel. While research on biomass is in its infancy… one particular crop has caught the eye of researchers who say it would be perfect for Midwest power plants. The Great Lakes Radio Consortium’s Shawn Johnson reports:
Transcript
Low prices for corn and soybeans have led many Midwest farmers to look for a new crop to mix
with their usual rotation. Some are turning to plants grown specifically for what’s called
“biomass.” Biomass crops can be used as fuel. While research on biomass is in its infancy… one
particular crop has caught the eye of researchers who say it would be perfect for Midwest power
plants. The Great Lakes Radio Consortium Shawn Johnson reports:
In a farm field not too far from the University of Illinois stands a small plot of miscanthus. The
wavy, 12-foot tall grass topped with fluffy, seedless flowers is native to some places in Europe,
where it’s catching on as a crop to burn. Researcher john clifton-brown of Trinity College in
Dublin, Ireland has grown miscanthus on his father’s farm for 12 years now. He says it’s a
natural fit for Illinois.
“You seem to have in Illinois superb soil. You seem to have very low corn prices. You have
rainfall. And these factors combined look like a golden opportunity for the development of
renewable energy from biomass crops like miscanthus.”
Miscanthus is giant grass that can be planted in the same fields that normally grow corn and
soybeans. The similarities pretty well stop there. Where most Midwest farmers are used to
growing crops that produce food, miscanthus is grown specifically to be chopped off, bailed, and
burned, usually with coal in coal-fired power plants.
John Caveny owns the land where this miscanthus plot is growing. He stops short of calling this
a new way of farming:
“Well, in way it is, in a way it isn’t. What all farmers do, when you get right down to it, is
advance the value of sunlight energy. That’s what you do, whether you grow tomatoes, whether
you grow flowers, whether you grow grass, whether you grow corn.”
In the case of growing miscanthus, the process is much different than that of most Midwest crops.
Farmers use multi-row planters pulled behind tractors to plant corn and soybeans. To grow
miscanthus, a producer needs to dig holes and plant sprigs of the grass one at a time to be
successful. The crop will grow back on its own year after year for up to 30 years, but it’s not big
enough to be harvested the first few years its in the ground. Even with all these complications,
University of Illinois researcher Steve Long says a farmer who’s willing to make an investment in
miscanthus can reap great rewards in the long run.
“You do need labor to put this into the ground, but then after that, this is considerably less labor
than corn or soybeans, and on current figures, it is more profitable.”
Those figures are more theory than reality at this point, because a market for miscanthus has yet
to emerge. Dynegy is the only power company that buys miscanthus in this part of Illinois. And
even dynegy won’t be ready to harvest biomass crops on a large scale for another five years. But
the energy company projects it could eventually pay 40 dollars per ton of dried… harvested
miscanthus. That’s pretty good money for the farmers. The reason dynegy will pay that much?
While it doesn’t burn as efficiently as coal… miscanthus emits far fewer pollutants. And while it
emits greenhouse gases such as CO-2 while it’s burning, it will recapture those gases when it
grows. As energy companies are forced to meet more and more environmental requirements,
Dynegy’s Chris Williams says miscanthus becomes appealing:
“It’s getting closer and closer to the cost of coal generation. And you look at that with the
environmental benefits of the biomass, it really makes sense to do the research now to get it into
production as soon as we can.”
Dynegy is looking for farmers to grow miscanthus within a 50-mile radius of one of its central
Illinois power plants. But the company doesn’t know how many farmers it will be able to find.
Even if enough farmers are interested, dynegy is still working out the specifics of harvesting,
shipping, and burning grass effectively.
Miscanthus and biomass crops such as corn for ethanol and soybeans for soy diesel are just part
of a growing renewable energy market. And they face plenty of competition. Hans Detweiller is
with the environmental law and policy center, which advocates renewable energy in the Midwest.
Detweiller says wind and solar power generation are simply more established than biomass right
now:
“Biomass energy has more questions I think in the minds of the public than some of the other
energy sources, but we would like to see more of it. Especially where you can get parallel
benefits such as increased water quality, increased wildlife habitat, things like that.”
Detweiller says miscanthus could fit that billing, but other biomass crops might be more suitable.
Depending upon who you talk to, fields of young aspen or willow trees could even be the biomass
crops of the future. And Detweiller says a native plant like switchgrass is an attractive option
because it does not grow nearly as thick as miscanthus allowing wildlife to forage more freely.
But it’s that thickness that researcher John Clifton brown says makes miscanthus so appealing
and potentially so profitable to a farmer. As he stands next to a wall of miscanthus, Clifton-
Brown says the crop he’s grown in Ireland for a dozen years will only perform better in America.
“So try it. Suck it and see as we say in Europe.”
Clifton-Brown’s miscanthus is harvested only once a year. Others biomass crops are chopped off
a few times. They each have slightly different growing seasons, but all have at least one thing in
common. They represent a future where the energy we mine today could eventually be mowed.
For the Great Lakes Radio Consortium, I’m Shawn Johnson.
This Thursday (November 21st), trees will be planted in every state capitol in all 50 states. The non-profit group, the National Tree Trust, is organizing the coordinated planting. The Great Lakes Radio Consortium’s Tamar Charney reports:
Transcript
This Thursday (November 21st), trees will be planted in every
state capitol in all 50 states. The non-profit group, the National Tree
Trust, is organizing the coordinated planting. The Great Lakes Radio
Consortium’s Tamar Charney reports:
The National Tree Trust is celebrating the fact that they’ve planted 10
million trees since the organization was founded in 1990. That works out to
be almost two trees per minute. The tree trust helps local communities
plant trees and educates people about the benefits of trees.
Paul Rosenthal is with the National Tree Trust. He says this coast to coast
tree planting event will draw attention to the importance of trees in our
communities.
“It’s the trees that are planted in the urban areas and suburban areas of the
United States… are the ones which really go very far in helping to clean the
air where we live, clean the soil where we live, provide cooling shade where
we live, to help bring down energy costs in the summer and winter time.”
He says according to their calculations, one urban tree provides over
57-thousand dollars worth of benefits over its 50-year life span.
For the Great Lakes Radio Consortium, I’m Tamar Charney.
Most of us think of earthworms as beneficial creatures. Gardeners are always happy to spot a worm in the flowerbed because they add fertilizer to the soil. Many anglers say they’re the best thing for catching fish. But scientists are beginning to learn worms aren’t so friendly to Great Lakes forests. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:
Transcript
Most of us think of earthworms as beneficial creatures. Gardeners are always happy to spot a
worm in the flowerbed because they add fertilizer to the soil. And many anglers say they’re the
best thing for catching fish. But scientists are beginning to learn worms aren’t so friendly to
Great Lakes forests. The Great Lakes Radio Consortium’s Stephanie Hemphill reports.
(fade up Girl Scouts)
This Girl Scout troop is learning about worms. Judy Gibbs is a naturalist at the Hartley Nature
Center in Duluth. She shows the girls how to coax worms out of the soil. They pour water laced
with powdered mustard into the worms’ burrows.
It irritates the worms and they come squiggling up by the hundreds.
“Pour it in. Wait a minute. Here it comes. It doesn’t like the mustard and it comes right up.
Look at this one (laughter). oh, there’s another one. Look at it go!” (shrieks)
On their walk through the woods, the girls look for dead leaves. There aren’t many. Judy Gibbs
explains why.
“Here’s a leaf stem that’s being pulled into this hole. Who’s doing this? Ants! No. Worms.
There’s big night crawlers. You know what a night crawler is? They grow straight down into the
ground, and they come up at night and pull leaves down into their burrows. And they eat the leaf
right off. That’s why we’re not finding any leaves.”
Worms eating leaves might seem natural, but it turns out these worms aren’t native to these
woods. The last glacier buried most of what is now the Great Lakes region. When it melted,
plants and animals returned to create a community of maples, pines, songbirds, and tender plants
growing on the forest floor, like trillium…but not earthworms.
Cindy Hale is a biologist who studies the native wildflowers that grow in northern hardwood
forests. She loves the spring bloomers that take root in the spongy layer of decaying leaves on
the forest floor. Trillium, bloodroot, solomon’s seal.
Hale says many of these plants are disappearing.
“Sites that forty years ago were carpets of trillium have been slowly over the last two decades
declining to almost nothing, and people were scratching their heads, trying to figure out just
what’s going on.”
Earthworm populations are thickest close to cities. But Hale says people bring worms with them
when they come to the woods.
At first, settlers carried them in, along with the animals and plants they brought from Europe or
the east coast. These days, worms are spread by people who drive in the woods – loggers, ATV
riders…
“But in particular, fishing bait is a huge way that worms get moved around in our region.
Because there’s so many lakes and so much fishing.”
Hale and her colleagues set up test plots along an advancing line of worms in the Chippewa
National Forest in central Minnesota. The worms crawl about three yards further into the forest
each year. Hale is studying how the soil and the plants have changed as the worms advance.
Worms eat the decaying leaves on the forest floor. They mix that organic matter into the mineral
soil beneath it. And in time, they can use up all the organic matter and leave only mineral soil
behind.
That means the plants that have evolved to take root in the leaves on top of the soil have lost their
home.
Hale says these changes could affect every plant and animal that lives in the woods. She says,
for instance, even birds have declined by nearly 50% in the last fourteen years.
“Because ovenbirds nest in that forest floor, so if you lose the forest floor, then you may well
affect ground-nesting birds such as that. So when you start thinking about it, the potential
ramifications across the ecosystem get really wild.”
Hale says one of the big challenges in studying this problem is that there’s been very little basic
research – like how many worms are there are and where.
To gather more information and to get more people involved, Hale created a web-based learning
program. She’s asking teachers from around the country to have their classes do worm counts
and other research. Hale plans to add their data to the web page.
In Minnesota, the Department of Natural Resources is working with interest groups to try to slow
the spread of worms. Next year’s fishing regulations will include instructions not to dump your
worms at the end of a day of fishing.
For the Great Lakes Radio Consortium, I’m Stephanie Hemphill in Duluth.
Water is of growing concern to people in the Great Lakes region, especially after this summer’s widespread drought. Now researchers are testing a device that could help Midwest farmers decide the best way to manage their water. The Great Lakes Radio Consortium’s Rebecca Williams has more:
Transcript
Water is of growing concern to people in the Great Lakes region, especially after this summer’s widespread drought. Now, researchers are testing a device that could help Midwest farmers decide the best way to manage their water. The Great Lakes Radio Consortium’s Rebecca Williams has more:
The device is called an electron moisture sensor. It measures the amount of moisture in soil, as deep as 3 feet below the surface. The sensor is hooked up to a hand-held computer that brings together soil data with information about weather and the type of crop being raised.
Rich Hoddup is an agriculture extension agent with Michigan State University. This year, he recruited several farmers to test the moisture sensor. He says the farmers are reacting to the system with optimistic caution.
“They’re looking at it and saying, well, it’s kinda nice to be able to understand what’s going on below the soil profile, rather than waiting until that crop begins to show symptoms of drought.”
Rich Hoddup thinks the sensors may allow farmers to increase their yields, by telling them when and where to add water to their crops. He plans to continue his research to see if the benefits to farmers will outweigh the high cost of the system.
For the Great Lakes Radio Consortium, I’m Rebecca Williams.
A herbicide is being found lingering in grass clippings and causing compost to damage gardens. The Great Lakes Radio Consortium’s Lester Graham reports:
You probably have a computer in your car, on your desk and maybe even in your stove. It seems like there are computers everywhere these days helping with everything from our checking accounts to our turkey roasts. Now researchers want to install computers in another place, where most of us would least expect it – in Old MacDonald’s tractor. The Great Lakes Radio Consortium’s Daniel Grossman has this story:
22 colleges and universities around the country, including three in the Great Lakes region, will be sharing $22 million in grants to help address hazardous waste problems. The Great Lakes Radio Consortium’s Jonathan Ahl reports:
Transcript
Twenty-two colleges and universities around the country, including 3 in the Great Lakes region, will be sharing twenty two million dollars in grants to help address hazardous waste problems. The Great Lakes Radio Consortium’s Jonathan Ahl reports:
The U-S EPA is providing the funding for a variety of research projects. Some of the funding will go toward finding better ways to dispose of hazardous waste, both in groundwater and soil. Other projects will focus on ways to find more effective and efficient ways to remove hazardous waste from sediment and at mining sites.
Nearly a third of the total funding will go to outreach programs to help people in low-income communities. The money will be used to help them take an active role in cleaning up waste sites, and to prevent the addition of any more problem areas in their communities.
Purdue University will head up the grant projects in the Midwest. Michigan State University and Central State University in Ohio will also be involved.
For the Great Lakes Radio Consortium, I’m Jonathan Ahl.
A just-released study by two environmental groups has found high levels of arsenic on the surface of pressure-treated wood products. The Environmental Working Group and the Healthy Building Network tested pressure-treated wood purchased from home improvement stores in 13 cities. In releasing their findings, the groups are calling for a ban on the use of the lumber in construction. Their findings add to the growing concern about the safety of the chemicals used to treat this wood. Those chemicals are now being re-evaluated by both the Canadian and American governments. But as the Great Lakes Radio Consortium’s Karen Kelly reports, the two governments are approaching the issue differently:
Transcript
A just released study by two environmental groups has found high levels of arsenic on the surface of pressure-treated wood products. The Environmental Working Group and the Healthy Building Network tested pressure-treated wood purchased from home improvement stores in 13 cities. In releasing their findings, the groups are calling for a ban on the use of the lumber in construction. Their findings add to the growing concern about the safety of the chemicals used to treat this wood. Those chemicals are now being re-evaluated by both the Canadian and American governments. But as the Great Lakes Radio Consortium’s Karen Kelly reports, the two governments are approaching the issue differently.
For years, Don Houston at the Canadian Institute of Child Health has been calling for warning labels on pressure-treated wood. The lumber is used in playground structures and picnic tables throughout North America. And it’s treated with a preservative called Chromated Copper Arsenate, which protects the wood from insects and fungi. The preservative is made from arsenic, chromium and copper. And Houston says children who are exposed to the wood may be exposed to those chemicals, as well.
“It’s not just children’s play structures. I’d rather suspect even more problematic is the deck that’s on the back of their house because often times children spend more time there. It’s all sorts of structures that are put in outdoors – decks, balconies, retaining walls; even the telephone pole that might be in a schoolyard might be problematic.”
Houston says the problem arises when arsenic and chromium, which are both carcinogens, remain on the surface of the wood. A study of ten playgrounds conducted by Health Canada in the late 1980’s detected both substances on the surface of play structures made with pressure treated wood. Arsenic and chromium were also found in the nearby soil. Health Canada warns people who work with pressure-treated wood to wear gloves and a mask and to thoroughly wash clothing and exposed skin once they’re finished. The agency also warns against burning pressure treated wood. But Houston says there are still no guidelines for children.
“It doesn’t make a lot of sense for the guy who’s building it to use gloves and then the child ten minutes after it’s built to be walking over it and running on it barefoot and having greater potential health impact from the exposure.”
But scientists at Health Canada say the research findings have been mixed. They point to studies conducted by the U.S. EPA in the late 1980’s that found minimal health risks. Now, fifteen years since they last evaluated these chemicals, both Health Canada and the EPA are taking another look. The update is required by law in both countries. Richard Martin is a toxicologist at Health Canada’s Pest Management Regulatory Agency. He says the presence of arsenic is not always a cause for concern.
“Although there’s a number of reports out there of arsenic being found in soil, and although they’re useful, arsenic is found in all soil. So we need to go the extra step to determine to what extent there’s potential for exposure to children and that type of thing.”
Martin says his agency is reviewing research to determine the effect of exposure on both adults who work with cca-treated wood and children who play near it. But the U.S. Environmental Protection Agency is taking the review a step further. Jim Jones, the deputy director of the EPA’s office of pesticide programs, says they’re concentrating on the exposure to children first.
“It was the children’s exposure through cca-treated wood we think are the most important to look at as they’re the group in the population that is likely to have the greatest exposures, just because of the way in which they interact with playground equipment and on decks.”
The EPA also plans to take soil samples near cca-treated wood structures in 75 playgrounds around the United States. And it’s considering a recommendation that people apply sealants to pressure-treated wood in the interim. The EPA’s scientific advisory panel suggested the agency take that measure. The EPA and Health Canada are collaborating on the re-evaluation – sharing their findings and their recommendations. Don Houston of the Canadian Institute of Child Health hopes that will lead to legislation in both countries that will restrict the use of this lumber in places where children play. The EPA and Health Canada are expected to announce their recommendations next spring.
For the Great Lakes Radio Consortium, I’m Karen Kelly.