Radon Continues to Plague Americans

  • David Aschenbrenner from Pro-Tech Environmental installs a radon mitigation system. (Photo by Mark Brush)

There’s an invisible, odorless gas that kills 21,000 Americans every year. We’ve known about radon gas for a long time. But as Mark Brush reports, experts say we’re still a long way from fixing the problem:

Transcript

There’s an invisible, odorless gas that kills 21,000 Americans every year. We’ve known about radon gas for a long time. But as Mark Brush reports, experts say we’re still a long way from fixing the problem:

Radon gas is found down here…

…in the basement.

Really, it’s all around us. The gas drifts out of the ground from bits of uranium ore. Normally, there’s not enough of it to cause a problem. But it can get trapped in our homes, schools, and offices. We breathe it in. And the gas can cause lung cancer. It’s the second leading cause of lung cancer next to smoking. And if you’re a smoker – you’re even more at risk.

The level of radon gas in this basement is unsafe. More than four times a safe standard set by the EPA:

So a crew of two guys is here to fix the problem.

David Aschenbrenner works for Pro-Tech Environmental in Ann Arbor, MI. He says radon gas seeps up from the ground and makes its way into the house through cracks and holes in the foundation:

“So as the air is rising through the house, the house acts as a chimney. It’s creating what we call the stack effect. And that’s what’s actually pulling the radon in.”

You can’t see it. You can’t smell it. But it’s often there.

“So with the radon piping, and the radon fan, it’s going to create a suction slightly stronger than the house breathing normally.”

They drill a hole in the basement floor – put a PVC pipe into the hole. And fan on the pipe will vent the radon gas outside.
Right now – a lot of people find out about radon when they buy or sell a house. The air is tested and if there’s a problem – it can be fixed.

Bill Field is an epidemiologist at the University of Iowa. He’s studied the health risks of exposure to radiation for decades. Field says these systems work. But even though more people know about the threat of radon gas – there are still more people exposed today than in the past:

“We’re further behind now, than we were 20 years ago with addressing the radon issue, because more homes are being built that aren’t radon resistant than are being mitigated. Each year there are tens of thousands of home that are coming on the market that will hopefully be fixed someday, but they could have been fixed when they were first built.”

Field says new homes should be built to keep radon out. He says simple changes in home construction – changes that would only add $500 in construction costs – would work. He says there should be a federal requirement to build homes this way, since radon can be a problem in every state.

There are some states, counties and cities that have radon resistant new construction written into their building codes – but more than half don’t – and even in the places that do have the code on the books – workers told us that it’s not always enforced – so it’s easy to just skip the requirement.

The National Association of Home Builders says it would oppose any federal requirements to build homes this way. They say radon should be dealt with where there are known hot spots.

There are parts of the country where radon can be bigger problem than in other areas. But it can be a problem no matter where you are. The EPA has a recommended standard for radon gas. It says that homes or offices or schools should be fixed if they have radon levels of 4 pico-curies per liter or more. But Bill Field says sixty percent of the cancers caused by radon were caused at levels below this EPA standard:

“Talk about a safe level of four pico-curies per liter is really a misnomer. It’s like saying it’s o.k. to cross the road blindfolded because there’s only one car coming instead of three. There really is no safe level of radon.”

A recent report by the President’s Cancer Panel evaluated the progress being made on cancer prevention. Exposure to radioactive radon gas is one of the areas where the experts said not enough is being done. And because the problem is getting worse – they’re recommending the government do more.

For The Environment Report, I’m Mark Brush.

“You can test your air for radon gas by buying a test kit at your local hardware store. They cost between ten and twenty dollars.”

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New Details on Bat-Killing Fungus

  • In caves where 200 to 300 thousand bats used to hibernate, scientists like Scott Darling have found that this year there are only hundreds. (Photo courtesy of the US Fish and Wildlife Service)

Scientists are racing to find a way to fight-off a fungus that’s killing bats. More than a million bats have died so far. Scientists believe entire hibernating bat species could be wiped out within two decades. Laura Iiyama reports the cause might have come from overseas:

Transcript

Scientists are racing to find a way to fight-off a fungus that’s killing bats. More than a million bats have died so far. Scientists believe entire hibernating bat species could be wiped out within two decades. Laura Iiyama reports the cause might have come from overseas:

Biologist Scott Darling knew something was wrong in a recent winter when he got several calls at his Fish and Wildlife office in Vermont. People told him about hundreds of bats flying in the air and dying in the snow. During winter, the furry mammals should be hibernating.

He went to Aeolus cave. It’s where the bats in the area should be crowded together on the walls and ceiling.

“Aeolus cave became a morgue. Bats freezing to death in clusters just outside the cave entrance. Most of the bats flew out of the cave onto the landscape to certain death.”

Where 200 to 300 thousand bats had hibernated just four years ago, this year there are just a couple hundred.

The dead bats had white nose syndrome.

The white powdery fungus was first noticed on bats in New York State in 2006. It’s spread into Ontario, Canada and as far south as Tennessee.

The fungus is not directly killing the bats.

Thomas Kunz is a professor at Boston University. He suspects the fungus keeps waking-up the hibernating bats.

“It may be simply the irritation from the fungus that is causing, if you have athlete’s feet, it itches.”

Instead of hibernating, surviving on their fat reserves, the bats keep waking-up. They burn off the fat. They get too thin. And they die.

Word spread about the fungus.

Thomas Kunz says some scientists recalled seeing a white fungus on bats elsewhere:

“Bat biologists in Europe have observed and reported that there are bats that do have the fungus although it doesn’t seem to be killing them.”

Scientists think someone visited a cave in Europe. Spores from the fungus got on clothing or shoes. Then that person wore the same shoes or clothing in a cave in the U.S. The spores were picked-up by the bats.

The bats huddle together in hibernation, easily spreading the fungus.

Often 90 percent of the bats are killed-off after the first appearance of the fungus. And Kunz says that may have been what happened to bats in Europe because we don’t find as many bats in European caves as there have been in North American caves:

“Now it’s very possible that in historic times there were large numbers of hibernating bats in Europe and these are the leftovers, these were the survivors that may be resistant to the fungus.”

So the arrival of the fungus may mean US bat species will permanently drop in numbers, like the bats in Europe.

David Blehert (blee-hurt) of the US Geological Survey says if that’s the case, it will be a dramatic change in life in caves in America and Canada.

“Whereas we have hibernation caves with 100 thousand, 300 thousand and even commonly lower ten thousand but those are rather common sites where we’ve seen the fungus decimate up to 95 percent and greater to the animals in the cave. Many of the European hibernation sites have between one and thirty animals.”

There’s no treatment for white nose syndrome. And even if a cure is found, it will be a very long time –centuries– before the bats recover. Bats reproduce slowly. The females have only one pup, one baby bat, per year. And there are over a million bats dead so far.

For The Environment Report, I’m Laura Iiyama.

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Deer Birth Control

  • Gardiner Joe Williamson says sterilization does nothing to solve the immediate problem of too many deer. (Photo courtesy of Adam Allington)

Whitetail deer have adapted pretty well to the suburbs. But… it means a lot of car-deer accidents. It also means deer munching on tulips and shrubs. Some people consider them pests and want to get rid of the deer. But instead of simply killing them, one city has decided to capture and sterilize a number of does.
Adam Allington reports, the results might point toward the future of urban wildlife management.

Transcript

Whitetail deer have adapted pretty well to the suburbs.

But… it means a lot of car-deer accidents. It also means deer munching on tulips and shrubs. Some people consider them pests and want to get rid of the deer.

But instead of simply killing them, one city has decided to capture and sterilize a number of does.

Adam Allington reports, the results might point toward the future of urban wildlife management.

It’s a crisp night in Town and Country, Missouri…home to some 10,000 souls…and about 800 deer.

“There goes a deer over there, it’s just to the left of the tree, you can barely see it.”

Joel Porath is a wildlife regional supervisor for the Missouri Department of Conservation. Just like humans, whitetails he says, are right at home in the quiet cul du sacs of suburbia.

“They have all the food resources, they don’t have hunting and they don’t really have predators, so mainly vehicles are what kill them in communities like this.”

Lynn Wright sits on Town and Country’s board of aldermen. Despite the accidents she says most folks like seeing the deer around…kind of reminding them that they don’t live in the city.

“But when you start going from 2 or 3 and seeing 10 or 12 in the backyard you do start getting concerned about that.”

The car accidents were a problem, but Wright says people also complained about damaged trees and landscaping. Still, the town resisted the easiest solution—to just hire sharpshooters to come in and kill all the deer.

Instead, they explored alternative methods…this is sound from a department of conservation video…it shows four deer eating corn in a back yard…just then, a large dropnet is released…sending them into a flailing frenzy until technicians rush in with tranquilizer shots.

The deer are then brought to Steve Timm. Timm is a veterinarian with White Buffalo Incorporated. Its a company that specializes in sterilizing deer.

“We’ve got two does coming in. We’re going to sterilize them by removing ovaries.”

Timm operates out of a small eight by sixteen foot trailer… When the does arrive they’re hoisted on to an operating table and prepped for surgery.

“I’ve located the left ovary here, and so I’ll clamp it, bring it to the surface, use cautery to prevent any bleeding.”

The whole process takes about 20 minutes. The deer are then stapled up, fitted with reflective collars and released.

Timm says the theory is simple—fewer fauns mean less deer eating shrubs and running into cars.

“The early information suggests, that if there are some deer in the environment, especially our sterile does, the other deer have less tendency to move in.”

But not everyone backs the sterilization approach.

Joe Williamson is a retiree who loves to garden. Walking around his yard he points out flowering magnolias, yews, Japanese maples…basically, a kind of all-night deer buffet.

“This is a good example of antler rubs, this is called Staghorn Sumac. The bucks rub their antlers on here and they break them off, you see all these…its just wrecked.”

Williamson says sterilization does nothing to solve the immediate problem of too many deer. It’s also much more expensive. Town and Country paid White Buffalo 150-thousand dollars to sterilize 112 does, and kill another 100.

But, Joel Porath of the Department of Conservation says in the end, the best solution may involve sterilizing some deer…and killing others.

“Could you imagine if we stopped allowing deer hunting in the state? You know we kill around 300,000 dear each year and it doesn’t take very long for the population to jump back up. So, they do need to continue to do something in Town and Country down the road.”

By the end of spring Porath says the department should have enough information to see if sterilization makes sense for other suburban areas.

For The Environment Report, I’m Adam Allington.

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Prairie Dog Wars

  • Keith Edwards, a rancher in Kansas, is in favor of poisoning the prairie dogs. (Photo by Devin Browne)

Often we hear stories about
the government trying to get
farmers and ranchers to do
things that are better for
the environment. But Devin
Browne has a story about a
rancher trying to do something
better for the environment
and getting in trouble with
the government:

Transcript

Often we hear stories about
the government trying to get
farmers and ranchers to do
things that are better for
the environment. But Devin
Browne has a story about a
rancher trying to do something
better for the environment
and getting in trouble with
the government:

In western Kansas, there’s a war going on. People are suing each other and threatening each other and there’s poisons and noxious gasses involved. They all call it the ‘prairie dog wars,’ but few of them agree on what it is they’re really fighting about.

Some people say this is about a bad neighbor who’s ruining things for other ranchers. Some say it’s about whether you can let wildlife live on your land. And still, other people say that the conflict in Kansas is about whether the government gets to tell you what you can do on your own land.

(sound of prairie dog barking)

Prairie dogs about a foot tall, in the squirrel family, though technically rodents. Ranchers hate them because they eat grass that’s meant for cows. But biologists love them because where there are prairie dogs there are also all the other animals that need them for food or shelter – hawks, foxes, badgers, owls, and maybe most importantly – the black footed ferret, one of America’s most endangered mammals. We’ll tell you more about the ferret in a moment.

“It’s been said that prairie dogs are the most important animals on the plains and I agree with that.”

At the center of all this controversy is Larry Haverfield He’s a bearded guy in bib overalls, a born and bred Kansas rancher. Four years ago, he stood up at a county meeting and said he liked prairie dogs. And he wasn’t going to kill them anymore.

Ever since then his neighbors have been organizing against him.

Keith Edwards is one of them.

“We’ve had county meetings, we’ve had a petition, we’ve filed the legal complaints that you can go through the county, and we’ve done that several times.”

Second, third, fourth generation ranchers will tell you so in no uncertain terms they’ve been fighting a war against the prairie dogs. But now these ranchers are fighting against one of their own, Larry Haverfield. It’s gotten ugly. Some might even say petty.

Again, Larry Haverfield.

“Well, they’ve threatened to come in on us, and they have, we haven’t paid all the bills yet either.”

When he says come in on us, he means come in onto his property. Exterminators hired by the county to poison the prairie dogs, the one or two days a year when he’s not home – when he and his wife are in court, in Topeka, battling lawsuits. And then, not only the poisoning, but the bill for the poisoning – for thousands of dollars.

This might sound like illegal trespassing, but, in Kansas, there’s nothing illegal about it. An old law, from 1901, says that the government can poison varmints on your land & then bill you if you don’t kill them yourself.

Haverfield says it’s not just the prairie dogs that are affected by the poisoning. The endangered black footed ferrets eat prairie dogs to survive. Since there are so many prairie dogs on the Haverfield’s land, it was decided that they should host one of the first re-introductions of the ferrets. Since it’s endangered, it can’t be legally poisoned.

But the ferrets didn’t stop the county. Haverfield says the state law and the federal Endangered Species Act are working against each other.

“That’s quite a conflict, we think the endangered species act will rule in that argument.”

And an environmental group thinks Haverfield should be able to do what he wants on his land. Ron Klataske is with the Audubon of Kansas.

“Basically, the conflict in western Kansas is: are landowners allowed to have native wildlife on their land?”

Ironically, ranchers such as Keith Edwards say they’re worried about being able to do what they want on their land too.

“Our question is: what will be able to do with our land when the black footed ferret becomes established? And we poison prairie dogs and it accidentally poisons a ferret? Does that leave us open for a lawsuit? Scares us to death.”

Edwards is afraid that this is only the beginning – that if he can’t poison what he wants on his own land, will he have any freedoms as a farmer at all?

Haverfield says he plans to stick to his principles and keep the prairie dogs & the ferrets on his land, no matter what it costs him.

For The Environment Report, I’m Devin Browne.

Related Links

Population Control for Cormorants

  • Biologists Jim Farquhar and Mike Smith inspect the cormorant nests in the treetops. (Photo by Karen Kelly)

The pesticide DDT almost wiped
out the double-crested cormorant.
Now, the bird is thriving, and it’s
blamed for devouring fish in lakes,
rivers, and fish farms in many parts
of the country. Karen Kelly reports
on the struggle to share resources
with this unpopular bird:

Transcript

The pesticide DDT almost wiped
out the double-crested cormorant.
Now, the bird is thriving, and it’s
blamed for devouring fish in lakes,
rivers, and fish farms in many parts
of the country. Karen Kelly reports
on the struggle to share resources
with this unpopular bird:

(sound of clanking and birds)

Mike Smith eases a boat into the shallow water just off Little Murphy Island. It’s a tiny patch of sand and trees in the middle of the St. Lawrence River. It straddles the New York border with Canada.

Smith is a wildlife technician with New York’s department of environmental conservation. He specializes in cormorant management. That means he knocks down nests, breaks eggs, and – very occasionally – shoots them.

Before he even jumps off the boat, he starts counting the birds that are poking out of nests in the treetops.

“I see a few. I’m looking at their nests. We tried to have a zero percent successful reproduction rate.”

Smith counts maybe ten nests. They started with 150 or so in the spring.

There are tens of thousands of these birds. They spend their summers in the north. And in the winter, they go south where they raid fish farms.

Biologists estimate each bird eats a pound of fish a day. That can make a dent in the local fish population. The birds also strip trees of their leaves to create nests. And their guano ends up killing the trees’ root systems. That ends up driving out other animals that need vegetation.

Some people feel the birds should be eradicated. One group of anglers was even arrested for killing hundreds of them on Lake Ontario.

There are others, like the group Cormorant Defenders International. They feel they should be protected.

It’s up to biologists like Jim Farquhar of New York’s Department of Environmental Conservation to find the balance between human needs and cormorants.

Farquhar: “We have needs too, as people.”

Karen: “And we’re competing with them.”

Farquhar: “And we’re competing with them in some cases. Hopefully, if we can inject good science, we make good decisions as a result.”

The biologists’ biggest effort has been on Lake Ontario. They’ve been destroying nests there — and killing some adults – for ten years. Farquhar says they’re finally seeing results.

They’ve reduced the cormorant population on the lake by about two-thirds, and the fishing’s improved.

Now, the biologists are trying to have the same success on the St. Lawrence River. But they’ve only seen a 13% decrease in the number of cormorant nests and they’ve been doing it for four years.

Part of the challenge is that most of the birds live on Canadian soil where management is left to the landowner.

Local anglers like Steve Sharland of Ogdensburg, New York, are frustrated with the slow progress.

“They should eliminate them. They’re not a Northern New York bird and what they’re doing to our fisheries is a sin.”

That’s a common misconception. Actually, the cormorant is native to the region but few people have seen them in such large numbers.

Sharland says some people are so frustrated, they’ve been shooting the birds illegally. But Jim Farquhar believes those are isolated incidents.

“Mike just mentioned that we’ve got some black-crowned night herons nesting out here. It’s another species we’re concerned about, and one we’ve been trying to actively protect from the cormorants. So that’s a good sign.”

A good sign. But it’s another species trying to live on this small patch of land. And the biologists’ balancing act has become even more delicate.

For The Environment Report, I’m Karen Kelly

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Zapping Germs Off Your Food

  • Researcher Kevin Keener has been working on a device that turns the air inside food packaging into ozone (Photo by Ken Hammond, courtesy of the USDA)

Researchers are working overtime to find ways to kill dangerous bacteria in food such as Salmonella and E. coli. Rebecca Williams reports one researcher has found a new way to kill bacteria:

Transcript

Researchers are working
overtime to find ways to kill dangerous bacteria in food such as Salmonella and E. coli. Rebecca Williams reports one researcher has found a new way to kill bacteria:

Food processors expose produce like lettuce to ozone for a few seconds or minutes to kill bacteria.

Kevin Keener has been working on a device that turns the air inside food packaging into ozone.

Keener is a food process engineer at Purdue University.

He attaches the device to the outside of food packages – like a bag of lettuce – and applies electrodes that send high voltage through the bag.

“Visually it’s very Frankenstein-ish. It’s a safe process, there is a high voltage, but it’s similar to a spark you’d get with an electric fence.”

Keener says the ozone spends more time with the food so it kills more bacteria.

There’s a problem though – in some of their tests the device turned green spinach white.

So there are a few kinks to work out. But food companies are interested and we might see this commercialized in a year or two.

For The Environment Report, I’m Rebecca Williams.

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Usda Kills Wildlife

  • USDA Wildlife Services Killed 90,000 Coyotes in 2007 (Photo courtesy of Michigan Department of Natural Resources)

More than a hundred environmental
organizations want the incoming head of
the US Department of Agriculture to stop
killing wildlife. The agency has an office
that kills wild animals to save livestock.
Jennifer Szweda Jordan has more:

Transcript

More than a hundred environmental
organizations want the incoming head of
the US Department of Agriculture to stop
killing wildlife. The agency has an office
that kills wild animals to save livestock.
Jennifer Szweda Jordan has more:

The Center for Biological Diversity, the Sierra Club, and dozens of other groups signed on to a letter to Tom Vilsack. Vilsack is President-elect Obama’s pick for Agriculture Secretary. The environmental coalition is upset about the department’s Wildlife Services Agency. That agency removes or kills animals that threaten crops, farm animals, or cause other nuisances. Wildlife Services agents reported in 2007 that they killed more than two million animals, including 90-thousand coyotes, sometimes through poisoning.

Tom Vilsack did not return a call seeking comment about the letter.

The environmental groups say the poisonings and killings disrupt the balance of nature, and can leave persistent chemicals behind.

For The Environment Report, I’m Jennifer Szweda Jordan.

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A Treatment for Bleeding Fish Disease?

  • Signs of VHS, from the Michigan DNR (Photo courtesy of the US Fish and Wildlife Service)

A common treatment in fish hatcheries may slow – or even stop –

the spread of an invasive virus that’s killing fish across the Great Lakes.

Jonathan Brown has more:

Transcript

A common treatment in fish hatcheries may slow – or even stop –

the spread of an invasive virus that’s killing fish across the Great Lakes.

Jonathan Brown has more:

It’s called Viral Hemorrhagic Septicemia. Humans can’t catch it, but it
causes internal bleeding in fish.

The virus is hurting the region’s multi-billion-dollar sport fishing industry.

Now, researchers are finding that adding iodine – a common practice in fish
hatcheries – could prevent the virus from spreading.

Steve LePan is a biologist for the state of New York. He says a study at
Cornell University found Walleye eggs treated with an iodine solution were
not infected with VHS.

“We can’t say for sure that it’s exclusively the iodine that kills it. There may
be other things we do to the eggs that also affect the virus, as well.”

Those ‘other’ treatments include bathing Walleye eggs in Tannic Acid for a
few minutes before incubation.

LePan says there’s still a lot to learn about VHS, but he’s cautiously
optimistic that hatcheries can breed fish uninfected by the disease.

For The Environment Report, I’m Jonathan Brown.

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Westward Ho for the Ash Borer

  • Adult emerald ash borer (Photo by David Cappaert, Michigan State University, courtesy of the Michigan Department of Agriculture)

The emerald ash borer has eaten through
millions of trees in the US and is spreading
west. Erin Toner has more:

Transcript

The emerald ash borer has eaten through
millions of trees in the US and is spreading
west. Erin Toner has more:

For six long years, the tiny metallic-green emerald ash borer has been a killing machine,
starting with millions of ash trees in Michigan and Canada, and then munching its way
into 10 states.

It was recently discovered in Missouri, and now, it’s in Wisconsin.

The prognosis is not good.

Darrell Zastrow is with the Wisconsin Department of Natural Resources.

“Our forests are not typically resilient against non-native species and that is true for
the emerald ash borer. It is generally considered to be a poster child for invasive
species.”

Officials in Wisconsin are doing what everyone else has done – restricting the movement
of firewood and telling people how to protect their trees.

Some promising treatments to fight the emerald ash borer are being tested, but so far,
nothing has worked at keeping the insect from spreading west.

For The Environment Report, I’m Erin Toner.

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Cure for Frog Killing Fungus?

  • A solution may have been discovered to save frogs from the chytrid fungus (Photo courtesy of the US Fish and Wildlife Service)

Frogs are in trouble. A nasty disease caused by a fungus is wiping out frogs around the world. But researchers might have found a solution. Rebecca Williams has more:

Transcript

Frogs are in trouble. A nasty disease caused by a fungus is wiping out frogs around the world. But researchers might have found a solution. Rebecca Williams has more:

A disease caused by something called chytrid fungus is sweeping through frogs. When the disease moves through a frog population it can wipe out 80% of the entire population. Scientists have been rushing to find something that might help.

Reid Harris is a biologist at James Madison University. He says he’s discovered there are friendly bacteria that live on some types of frogs. And they can kill the fungus.

“It does seem like the pathogen moves in this predictable wave, so you might be able to get out in front of that wave sort of like a fire line.”

Harris says it might be possible to give wild frogs extra doses of the bacteria to fight off the fungus. But first they have to make sure there won’t be side effects.

For The Environment Report I’m Rebecca Williams.

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