Tag: bodies

Scavengers in Dire Straights

  • Vultures can eat 20% of their own body weight in one sitting. And they have digestive systems with special acids that will dissolve toxic bacteria and viruses. (Photo courtesy of the National Park Service)

For most people, the slow spiral
of airborne vultures means that
some unlucky animal has died. Now,
in some regions of the world, vulture
populations are dying. An American
scientist is part of an international
effort to save these massive scavengers.
Ann Murray has the story:

Transcript

For most people, the slow spiral
of airborne vultures means that
some unlucky animal has died. Now,
in some regions of the world, vulture
populations are dying. An American
scientist is part of an international
effort to save these massive scavengers.
Ann Murray has the story:

It’s hard to get too excited about an ugly bird that eats dead, rotting flesh. Let’s face it, vultures don’t have a good rep. But vultures are amazing animals. They can eat 20% of their own body weight in one sitting. And they have digestive systems with special acids that will dissolve toxic bacteria and viruses. Meaning, vultures prevent the spread of killer diseases like rabies and anthrax when they scarf down the carcasses of sick animals.

“With the meat goes the disease.”

That’s Todd Katzner, Director of Conservation and Field Research at the National Aviary in Pittsburgh. Katzner says, sadly, with all the good vultures do, many species are in big trouble.

“Vultures are in dire conservation straits in much of the world because of things like habitat loss, poisoning and now these new problems like diclofenac.”

Diclofenac is a medicine given to sick livestock in central Asia. Vultures that eat livestock carcasses with traces of the drug almost always die of immediate kidney failure. It took scientists some time to figure that out. Katzner’s friend Vibhu Prakash, an Indian ornithologist, recognized the beginnings of this vulture die-off.

“This was almost 20 years ago that Vibhu started seeing vultures near Barrackpore, India. They were sitting in a tree with their heads hanging down .Eventually they’d just fall out of the tree and die on the ground.”

Since then, Indian white-backed vulture numbers have plummeted from 30 or 40 million birds to just thousands. This massive decline has left scientists scratching their heads about how many vultures are left in central and south Asia and other parts of the world. Because vultures move around a lot, it’s been hard to keep track of individuals. There’s never been an accurate total population count – anywhere. That’s where Katzner and the National Aviary come in.

For several years, Katzner and his field team have been traveling to mountainous grazing lands in Kazakhstan and the northern plains in Cambodia . Katzner says the one place vultures reliably congregate is at feeding sites.

“We ask people if any livestock have died .We drive up to those sites . Usually the vultures have been there. When vultures feed on the carcass they leave feathers everywhere. And when we go to the carcass, we’re able to pick up sometimes 500 or 1000 feathers.”

Once the feathers are collected, Katzner’s team extracts DNA from them to identify individual birds. The scientists will use this information to create population models. This new counting method is faster and more reliable than capturing, marking and recapturing birds.

Katzner expects researchers will use his feather- based system to count endangered vultures in other places. That includes here, in the United States, where California Condors are dying from lead poisoning.

(sound of a vulture eating)

Before I leave the Aviary, Katzner points out an American black vulture. She’s gobbling a breakfast of chick pieces and mice. Katzner hopes his work will help to keep other vultures happy and hungry. He says we all need ‘em on the job as nature’s cleanup crew.

For The Environment Report, I’m Ann Murray

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Biggest Health Threat: Inactivity

  • One researcher says we need to re-engineer physical activity back into our lives. And part of that includes making communities super walk-able and bike-able. (Photo courtesy of the National Cancer Institute)

We hear a lot about how pollution
and contamination can hurt our health.
But an ongoing study indicates the
biggest threat to our health is a
lot simpler. Kyle Norris reports:

Transcript

We hear a lot about how pollution
and contamination can hurt our health.
But an ongoing study indicates the
biggest threat to our health is a
lot simpler. Kyle Norris reports:

Many of us have engineered physical activity out of our lives. We sit in front of the computer, we sit and drive everywhere. We don’t move much.

That’s what Steven Blair says. Blair is a professor of Public Health at the University of South Carolina. And he says, more than anything else, America’s physical in-activity will cause this century’s biggest public health problems.

“You want to stay out of the nursing home, the best insurance you can take out is regular physical activity program – three ten minute walks five days week. I’m not talking about training for the Ironman triathlon or a marathon.”

He says we need to re-engineer physical activity back into our lives. And part of that includes making communities super walk-able and bike-able.

For The Environment Report, I’m Kyle Norris.

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Dreaming Big, Despite Bankruptcy

  • One paint technology that GM is developing uses quantum dots - shown here irradiated with ultraviolet light (Source: Walkman16 at Wikimedia Commons)

Even though General Motors has filed for bankruptcy, Rebecca Williams reports the company is still dreaming big:

Transcript

Even though General Motors has filed for bankruptcy, Rebecca Williams reports the company is still dreaming big:

Someday you might be able to power your radio through your car’s paint.

Christopher Webb is GM’s senior creative designer.

He says GM’s research teams are giving some thought to solar powered paint. He says it might start with tiny solar cells called quantum dots.

“You could suspend these solar cells in a resin system or a waterborne or solvent carrier and spray it over the surface of the vehicle. Technically the entire surface of the vehicle could become almost a solar conductor.”

Webb says nobody knows exactly how this might work yet. But he says he’s confident that GM will continue their research into new technologies like this even with the bankruptcy announcement.

Something else that’s being talked about is using volcanic rock in paint. It could be a coating that would reduce a car’s interior temperature by reflecting heat – so you could use the air conditioning less often.

For The Environment Report, I’m Rebecca Williams.

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Green Last Requests, Part Three

  • One graveyard in Chicago is comprised of over 2.2 million dead at 43 cemeteries - that's a lot of land to maintain (Photo by Todd Melby)

During the past couple of centuries,
the typical graveyard hasn’t changed
much. Its central features still include
tombstones, winding paths, trees and
grass. Some critics want cemeteries to
ban tombstones, stop fertilizing, and
institute other green practices. Todd
Melby reports that traditional burial
practices die hard:

Todd Melby and Diane Richard produced a documentary on green burial called “Death’s Footprint.” You can listen to it here .

Transcript

During the past couple of centuries,
the typical graveyard hasn’t changed
much. Its central features still include
tombstones, winding paths, trees and
grass. Some critics want cemeteries to
ban tombstones, stop fertilizing, and
institute other green practices. Todd
Melby reports that traditional burial
practices die hard:

I’m in a mausoleum with Roman Szabelski. He’s the head of Catholic Cemeteries for the
Archdiocese of Chicago. He’s punching information into a computer.

Catholic grave locator: “Spell out the last name of the deceased that you are trying to
locate using the touch-screen keyboard …”

“So I’ve just keyed in my family name and I’m pushing search. Florence Szabelski is my
mother so I’m asking it to show that record to me.”

Szabelski started mowing grass at the cemeteries in 1979. Today, he presides over 2.2
million dead at 43 cemeteries. That makes Catholic Cemeteries one of the nation’s largest
graveyards.

Other than the high-tech grave locator, Szabelski says his customers prefer things the old
fashioned way.

“We come from a very conservative tradition where people want their 3 by 8, their grave,
to look like their backyard, which is perfectly manicured.”

Some people would like to change that. Advocates of something called green burial say
the perfectly manicured grass, the granite tombstones, the concrete burial vaults, the big
wooden or metal coffins, all of it, is wasteful.

Instead, they’d like to see graveyards filled with native grasses and flowers, rocks used as
grave markers, biodegradable coffins or no coffins at all.

So far, there’s not much demand for green burial.

Most people here are like Charlene and Margaret Villarreal, who are sitting near their
mother’s grave at Queen of Heaven Cemetery. Until her mother’s recent death, Margaret
Villareal had no reason to visit a cemetery.

“I’m 45 years old and nothing has brought me to the cemetery. Nothing, until she passed
away.”

The Villareals have decorated their mother’s grave with red roses, a crucifix festooned
with purple ribbons and a Chicago Cubs pennant.

On this day, they’ve come to honor their mother’s birthday.

Charlene Villarreal: “I’ve planned it since the day she died. I knew I would be here.”
(long pause)

Margaret Villarreal: “Oh get a grip. If she were here …”

Charlene Villarreal: “Sorry, Ma. It’s not as bad as it was on Mother’s Day. (Pause)
(Sniffles) I’m OK.”

They chose a traditional funeral for their mother. Her body was embalmed, which
allowed for an open casket. That casket was placed inside a concrete vault and buried. A
grave marker notes that she was a “loving wife and mother” who will always be in the
hearts of her family.

Margaret Villareal fears a green burial would have robbed her mother of the respect she
deserved.

“Here we are. We’re in the United States. That’s traditionally not how it’s done. You
might do that with animals. But as humans go there is more of a process of dignity
involved. You know, it sounds like that’s something you would do in a mass burial with
some kind of a tragedy like the Chicago fire but not something you’d do to remember
your loved one.”

Environmentalists dispute that. They say most people simply don’t know enough about
green burial to make an informed decision.

Whether that’s true or not, Roman Szabelski of Catholic Cemeteries is plowing ahead
with his plans. He’s got plenty of land on hand for tomorrow’s dead.

“We’re sitting in Queen of Heaven Cemetery right now, which is roughly about a 300-
acre site. About 100 of those acres are leased to the golf course next door. As we need the
property, the golf course will go from 18 to 9 to zero and a driving range and that
property will be used.”

When Szabelski adds up all the land Catholic Cemeteries owns, he figures it can keep
doing business as usual for the next 100 to 200 years.

For The Environment Report, I’m Todd Melby.

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Kicking a Chemical Out of Cans

  • Tomatoes are posing a problem for a BPA-free lining - they are so acidic they can eat through it (Photo by Scott Bauer, courtesy of the USDA)

More than a hundred studies have linked a chemical in plastic to health problems. Things like breast cancer, prostate cancer, diabetes, and early puberty. This chemical, bisphenol-A or BPA, is used to coat the inside of baby formula cans and almost all food and soda cans. Rebecca Williams visits one company that’s found a safer can:

Transcript

More than a hundred studies have linked a chemical in plastic to health problems. Things like breast cancer, prostate cancer, diabetes, and early puberty. This chemical, bisphenol-A or BPA, is used to coat the inside of baby formula cans and almost all food and soda cans. Rebecca Williams visits one company that’s found a safer can:

(sound of forklift backing up, pumpkin seeds pouring out of roaster)

It’s pumpkin seed roasting day at Eden Foods. It’s a natural foods company based in Michigan. It sells things like rice, canned beans, and all kinds of packaged fruits and sauces.

Michael Potter is the company’s president. More than a decade ago, he came across some news reports out of Europe.

“And I learned all the can linings in the USA were lined with this lining that leaches BPA into foods from the can.”

That got him thinking, and researching. Then he started badgering his can manufacturers.

“We virtually begged them to provide us an alternative. We persisted in hounding them and eventually the Ball Corporation said they’d make a can with an old lining they used to make.”

The lining’s made from a plant resin instead of the epoxy resin with BPA. The thing was, it would cost Eden Foods 14 percent more – that’s about 2 cents a can.

But Michael Potter says he had to make the switch.

“We’re selling this not only to people that we don’t know, in the market, we’re feeding it to our children, our grandchildren and ourselves – we didn’t want to eat bisphenol A.”

But there was one problem. He couldn’t make the switch for canned tomatoes.

Tomatoes are acidic, and they can eat through the plant resin can lining. That could lead to bacteria or rust getting into the food.

“There is no alternative for high acid foods other than bisphenol-A lining at this point. We are urging, nudging, demanding a bisphenol-A free alternative. And we’re optimistic we’ll end up with one.”

But the metal can industry says those alternatives just don’t exist right now.

John Rost is with the North American Metal Packaging Alliance. He says the industry is trying to find new materials. But he says shoppers shouldn’t worry about eating canned food.

“The levels of BPA that are coming from epoxy can linings are exceedingly low. We’re talking low parts per billion. That level has been deemed safe by the European Food Safety Authority, Health Canada and the US FDA.”

That’s true, but Health Canada has declared BPA toxic. It’s making moves to limit its use.

A number of independent scientists debate that there’s any safe level of BPA.

Maricel Maffini studies BPA at Tufts University School of Medicine. She says they’ve seen harmful effects on lab animals at the same very low levels of BPA that are leaching into our food from cans.

She says that’s because BPA acts like the hormone estrogen.

“You just need a tiny little signal to trigger an effect. So I think it’s unfair to say there is a safe dose because as scientists we cannot say that yet. We have not found a dose that is low enough where we don’t see effects.”

She says babies and kids are the most at risk. She says BPA has caused lasting damage in lab animals when the animals were exposed to the chemical both before and after birth.

“I think we should be concerned, I think we should limit our consumption of canned foods especially if you are pregnant or if you have babies.”

It’s possible that US can makers will be forced to stop using BPA. Leaders in Congress have introduced bills that could soon ban BPA in all food and beverage containers.

For The Environment Report, I’m Rebecca Williams.

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The Dioxin Debate

  • A sign on the Tittabawassee River, downriver from Dow Chemical Plant, stating to avoid contact with the soil and not eat the fish due to dioxin contamination (Photo by Vincent Duffy)

A group of one-hundred organizations is calling on the government to
release a twenty-year-old report on a toxic group of chemicals called
dioxins. Kyle Norris reports:

Transcript

A group of one-hundred organizations is calling on the government to
release a twenty-year-old report on a toxic group of chemicals called
dioxins. Kyle Norris reports:

Dioxins are everywhere – they’re created through manufacturing, burning
garbage, even burning gasoline.

The US Environmental Protection Agency did this big assessment of
dioxins, 20 years ago. But the report’s release has been stalled all that time
by industry lobbyists.

Michael Schade is with the Center for Health, Environment, and Justice. He
says not releasing this report is a health-risk to all of us.

“Every time you go to the grocery store and you buy milk or cheese or you eat beef or
pork or fish, you’re being exposed to this chemical in the food that you eat. And until the
EPA releases this report we’ll continue to be exposed to potentially dangerous levels of
this chemical which has been linked to cancer and endometriosis and other serious health
problems.”

The one-hundred groups have sent a letter to President Obama saying the
government has a responsibility to tell us exactly how dangerous dioxins are.

For The Environment Report, I’m Kyle Norris.

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Bpa in Your Body

  • BPA is not only found in plastic bottles, it is also found in the lining of most canned foods (Photo by Ken Hammond, courtesy of the USDA)

A chemical found in plastic might be present in people’s bodies more than previously thought. A number of previous studies suggest that even at very low levels bisphenol-A, or BPA, could be linked to health problems. They range from prostate and breast cancer to early puberty in kids. Rebecca Williams reports:

Transcript

A chemical found in plastic might be present in people’s bodies more than previously thought. A number of previous studies suggest that even at very low levels bisphenol-A, or BPA, could be linked to health problems. They range from prostate and breast cancer to early puberty in kids. Rebecca Williams reports:

Scientists thought our main exposure to BPA was through food because of plastic linings in cans and other containers. They also thought BPA didn’t stay in our bodies very long.

But in this new study, researchers found that people who fasted for 24 hours still had levels of BPA close to the same as people who’d just eaten.

So they think we might be exposed to BPA some other way. Maybe water – some plastic water pipes contain BPA. Or, BPA is staying in our bodies for longer than people thought. Or both.

Dr. Rick Stahlhut is the lead author of the study in Environmental Health Perspectives. He says there are some ways to reduce your exposure from food.

“You’d probably have to get food that was mostly fresh and cook it yourself and try not to use polycarbonate plastic to store food.”

And he says use containers and bottles that don’t contain BPA.

For The Environment Report, I’m Rebecca Williams.

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Toxin Leeches Into Canned Foods

  • (Photo by Ken Hammond, courtesy of the USDA)

Environmental activists are calling for
food packagers to stop using a toxic plastic to
line food and beverage cans. Lester Graham reports:

Transcript

Environmental activists are calling for
food packagers to stop using a toxic plastic to
line food and beverage cans. Lester Graham reports:

The thin plastic lining used in many canned foods and soft drinks contains a chemical
called bisphenol-A.

Canada is taking steps to restrict the use of the plastic in baby
bottles and formula can linings. In the U.S., some retailers have removed some
products using plastic with bisphenol-A.

Aaron Freeman is with the Environmental Defense Fund in Canada. He says this
chemical has been linked to too many health problems to ignore.

“Things like breast cancer, prostate cancer, early puberty in girls, attention deficit
disorder, and so on – those are all health effects we’re seeing sharp rises on.”

Freeman concedes cans lined with plastic containing bisphenol-A have not been proven
to cause the diseases. But he says since the canning industry has other plastics it can
use, it’s just a sensible precaution to stop using plastic with bisphenol-A.

For The Environment Report, this is Lester Graham.

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Relief on the Horizon for Allergy Sufferers?

  • To those who may recoil in terror from this picture, relief from peanut allergies may just be a vaccine away. (Photo by Mike Froese)

A new vaccine that reduces food allergies in dogs could
some day help people who suffer dangerous reactions to food like
peanuts, milk and wheat. The vaccine is also more evidence in
support of the so-called “hygiene hypothesis.” The Great Lakes
Radio Consortium’s Tracy Samilton reports:

Transcript

A new vaccine that reduces food allergies in dogs could some day help people who suffer
dangerous reactions to food like peanuts, milk and wheat. The vaccine is also more
evidence in support of the so-called “hygiene hypothesis.” The Great Lakes Radio
Consortium’s Tracy Samilton reports:


Allergies to foods like peanuts have become much more common over the past 20 years.
Some researchers believe it’s because, as a hygiene-conscious society, we’re no
longer exposing our bodies to infections that stimulate the immune system and protect
us from allergies. Pediatrician Dale Umetsu of Stanford University mixed a component
of Listeria bacterium and peanuts into a vaccine. He then gave it to dogs
with allergies so severe that one peanut made them sick.


“After the treatment, the dogs could tolerate up, on average, to 30 to 40 peanuts,
so this was quite an increase and the effect lasted several months, at least,
after the treatment.”


Umetsu says it could be five years or more before a vaccine is available for human trials.
A vaccine could help millions of people with food allergies.


For the Great Lakes Radio Consortium, I’m Tracy Samilton.

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State Tests People for Mercury Levels

  • While people are now aware of the health benefits of eating fish rich in omega 3 fatty acids like salmon, a study has shown that the risk of high mercury levels and heart disease might counteract those benefits. (Photo by Bartlomiej Stroinski)

Researchers in one state in the region are trying to
find out how much mercury load their residents are carrying.
So far, 300 samples have been collected for the study. And
the researchers have found that one-quarter of Wisconsin men participating in the study have high levels of mercury. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Researchers in one state in the region are trying to find out how much mercury load
their residents are carrying. So far, 300 samples have been collected for the study.
And the researchers have found that one-quarter of Wisconsin men participating in the
study have high levels of mercury. The
Great Lakes Radio Consortium’s Stephanie Hemphill reports:


The EPA says the safe level for mercury is one part per million. In the ongoing Wisconsin
study, one in four men and one in eight women have more than that in their bodies. The
study subjects volunteered for the study, so officials say they may not represent the
population overall.


Eating fish contaminated with mercury has long been thought to cause developmental
problems in young children. But now there’s research from Europe showing it can also
contribute to heart disease in adult men.


Lynda Knobeloch is a toxicologist with the Wisconsin Department of Health.


“There have been several studies that show that people who eat fish have less heart
disease because of omega 3 fatty acids, but the European study was able to sort out the
good effects of omega 3s from the bad effects of methyl mercury, and see that the mercury
actually can overwhelm the beneficial effects of omega 3s and actually cause heart disease.”


Wisconsin is requiring its utilities to reduce mercury emissions by 75% over ten years.


For the Great Lakes Radio Consortium, I’m Stephanie Hemphill.

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