Tag: treatment

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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Rainwater Toilets Caught in Red Tape

  • Jill Stites shows off a cistern that collects water from the roof of a welcome center for the Lake County Forest Preserve District of Illinois. An underground cistern collects water for fire protection and, come summer, toilets.(Photo courtesy of Shawn Allee)

Sometimes we hear complaints that environmental regulations stop us from doing what we want with our property.
Environmentalists say there’s one issue where doing the green thing can attract a bunch of red tape.
Shawn Allee reports it’s about using rain water to flush our toilets.

Transcript

Sometimes we hear complaints that environmental regulations stop us from doing what we want with our property.
Environmentalists say there’s one issue where doing the green thing can attract a bunch of red tape.

Shawn Allee reports it’s about using rain water to flush our toilets.

This story starts at a forest preserve in Lake County, Illinois, north of Chicago.

Jill Stites is here to show off the forest preserve’s custom-built welcome center.

Stites: This building was built for people to come out and see what people could do in their own homes.

In other words, the idea was, we could do it, it didn’t break the bank entirely, here’s something you might want to try, that sort of thing?
Stites: yes, you can really do green building in a responsible way.

Stites shows me how the building collects rain water from the roof.
That keeps rain out of sewers.
That way, the local waste-water treatment plant doesn’t waste chemicals and electricity to purify rainwater.
After all, rainwater’s already clean and you can store it in cisterns, like this one.

Stites: It collects water off of the roof and goes directly in there. and there’s a spout on the bottom of the cistern that you can hook up a hose to and water your flowers with.

But Stites’ building wanted bigger bragging rights.
They wanted to prove people can collect rain water for more than just flowers.
You can use it for something more urgent: flushing your toilet.

Stites: you don’t need drinking water to flush your toilet. you’re saving the water from going to the storm sewers to be treated to come back as drinking water when that’s not necessary.

There was trouble, though.
The forest preserve district couldn’t get a permit to use rain water in the toilets.

It wanted a connection to city water, as a kind of backup.

But the state worried untreated rain water might somehow contaminate the city’s drinking water.

It took years to get special permission.

Stites: We’re bragging about it. It’s been in the paper about the possibility of it happening and we’re hoping by summer that it’s going to be a fact.

Well, the Lake County Forest Preserve District got its permit, but it won’t let the issue die.
It wants average homeowners to have an easier time, so do environmental groups.

Ellis: It’s a time-consuming process. If we’re going to have more individuals and business doing this, it’s just going to become a bureacratice mess if they have to get variances every time.

This is Josh Ellis.
He’s with the Metropolitan Planning Council in Chicago.
He wants rain collection for toilets to go mainstream in Illinois, but state law needs an update.

Ellis: It would just be a matter of course instead of a special process just to run your toilets a little bit differently.

He says engineers and plumbers have proven rain water collection can work for toilets, safely.

Ellis: We just need to upgrade the plumbing code and I think it will be smooth sailing from there.

Maybe smooth sailing … if you have the cash.
I ask an industry leader for specifics.
His name’s Joe Wheeler, and he’s with the American Rainwater Catchment Systems Association.
The U-S Environmental Protection Agency estimates, each year the average household spends just 200 dollars on water.
Wheeler says, for a rain water collection system …

Wheeler: You could do a really good job for about 4500 to 15,000 dollars. Every house is different. We’re not talking McDonald’s Big Macs here, we’re talking every one of them is a unique situation.

Wheeler says overseas, using rainwater for toilets is common and cheap.
Take Germany, for example.

Wheeler: Basically when you go into a home, you don’t know … you can’t tell the difference.

But Wheeler says German homes and businesses get pushed toward rain harvesting.

Wheeler: People would actually get a rebate on their waste water and that gave the whole market in Germany a critical mass.

It doesn’t work like that here, so in the U-S, rain harvesting for toilets is nowhere near critical mass.

For The Environment Report, I’m Shawn Allee.

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America’s Food Waste

  • It takes 25% of all the fresh water Americans use just to produce food that ends up being wasted. (Photo courtesy of Samara Freemark)

Government researchers recently put out a study that says American’s throw away forty percent of their food. Samara Freemark reports:

Transcript

Americans waste a lot of food – by some estimates, almost half of the total amount in the food supply. Samara Freemark reports that the problem goes way beyond cleaning your plate.

A couple of months ago, government researchers put out a study that said Americans waste 40% of their food.

When I read that figure, it seemed incredibly high. So high that when I sat down with a food policy expert, I was actually a little embarrassed to ask her about it.

“I saw this number, 40%. Is that possible? It seems high to me.”

“I think the wasting of 40% of food, I actually think that could be a low number.”

That’s Jennifer Berg. She’s the director of the graduate program in food studies at New York University, and she spends a lot of time thinking about the food waste problem – in particular, about its huge environmental impacts.

It turns out, it takes 25% of all the fresh water Americans use just to produce food that eventually ends up in the garbage. It takes a lot of fuel to move that food around; packaging it takes plastic and paper, and throwing it away fills up landfills.

“There’s that old, you know ‘an orange peel…’ An orange peel takes years to break down. You know, a banana peel, half a loaf of bread. All that stuff goes into landfills. It doesn’t matter whether it’s organic matter or not. It doesn’t decompose. It doesn’t break down, when it’s all put together like that.”

Berg says Americans get plenty of messages about cleaning their plates.

But they don’t necessarily understand how much food gets wasted before it even makes it to the table.

“If you think about meat. Other countries, they will consume 85% of a cow. We will consume 30%. 20%. We only eat very specific cuts. We want our food totally filleted, we want it boned. We just eat very very specific food.”

I wanted to see what a waste-free meal looked like, so I took a trip to EN Japanese brasserie in Manhattan.

For the past couple of months, EN Brasserie has hosted special dinners where customers pay good money to eat the kinds of things most Americans throw away.

Reika Alexander owns the restaurant. She came up with the idea for the dinners when she moved to New York and saw how much food people in the city threw out.

“I realized that New Yorkers create so much garbage. When I saw that my heart was really aching. We have to do something about that.”

Alexander showed me some of the food she’d be serving that night. The first thing she handed me was a plate of fried eel backbones.

“We import live eels. So we get the whole thing. So we deep fry the bone part. It’s like a really flavorful rice cracker. Want to try. You just eat it? Like the bone? The whole bone? It’s good, right? It’s really good. The bones just fall apart in your mouth.”

There was a platter of rice topped with scraps of fish and vegetable trimmings. A salad made from salmon skin. And a cauldron of soup with whole fish heads bobbing in the broth.

“The eye, it’s so flavorful and delicious. The fish eyes have so much flavor. It makes a beautiful fish stock.”

At the dinner that night I asked college student Cordelia Blanchard what she was eating.

“I don’t know. I think the idea is that what’s left over the chefs just throw in a pot, and that’s what we have the pleasure of eating tonight. It makes me want to be more creative about how I combine what’s left in the kitchen sink.”

Which is the kind of attitude that restaurant owner Reika Alexander likes. Still, she says, she doesn’t expect the average American to sit down to a dinner of eel bones and fish eyes any time soon.

For The Environment Report, I’m Samara Freemark

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Salmon Spawning in Sewage Plant

  • Peter Baranyai directs Wastewater Operations for the Sanitary District of East Chicago, Indiana. The plant's effluent channel looks like a natural stream and has apparently fooled wilflide into thinking so, too. (Photo by Shawn Allee)

You might not expect much good
environmental news to come from
sewage plants, but, believe it or
not, there is some on occasion.
And in one case, that good news
even involves thriving salmon.
Shawn Allee has the story:

Transcript

You might not expect much good
environmental news to come from
sewage plants, but, believe it or
not, there is some on occasion.
And in one case, that good news
even involves thriving salmon.
Shawn Allee has the story:

Sewage plants are often out of sight, out of mind, and people usually like it that way. But people who work at the water treatment plant in East Chicago, Indiana, want everyone to know about an ecological come-back story there.

I’m game. So I meet the plant director Peter Baranyai.

Allee: “You’ve got this strange mix of some really striking natural areas, rivers and streams, but then everything’s kind of dotted by industry as well, and has been for a long time. What kind of industries are we talking about in this region?”

Baranyai: “Basic steel mills, oil refineries, chemical industries also.”

Allee: “So, when they’re talking ‘heavy industry’, they really mean it here?”

Baranyai: “Yes.”

Allee: “What are we looking at here?”

Baranyai: “We’re trying to look at our discharge channel. That’s the effluent from our treatment plant. This pipe here’s a 60-inch pipe.”

Allee: “You can see the water moving out of it pretty quickly.”

The treated wast water is from nearby homes and factories. And when it leaves the pipe, you’d swear it’s a natural stream. Apparently, it’s fooled plenty of critters, including Chinook salmon.

Each Fall, salmon swim from Lake Michigan, past shipping canals, steel mills and chemical factories – just to spawn in the treated waste water.

Baranyai: “They’re not being too cooperative today because I don’t see too much.”

The salmon spawned earlier than normal this year, so, I only find dead salmon on the banks.

Baranyai: “This was a, oh, almost 4-foot chinook salmon.”

Allee: “Or the evidence of it.”

Baranyai: “And he died.”

Allee: “Again, they’re kind of programmed to die after they spawn.”

Baranyai: “Yeah, he died on the rocks here.”

The government introduced Chinook salmon to Lake Michigan decades ago, but for a long time, salmon wouldn’t spawn here, and birds and nearly everything else shied away, too.

Baranyai says one problem was that they used to disinfect water with chlorine.

Baranyai: “It’s a very effective way of disinfecting, but it continues to disinfect downstream. It’s not selective, usually anyhthing that’s alive, it usually kills. It pretty much sterilizes everything. And that’s how most water treatment plants in our country do that, still.”


Baranyai says in the late 80s, things turned around. His plant added better filters, and now, when they disinfect water, they kill bacteria with ultraviolet light, not chlorine. In just a few years, salmon started spawning – right in the plant. Plus, fresh-water sponges grow in the plant, and herons showed up. Word got around.

Roger Klocek was a biologist at Chicago’s Shedd Aquarium at the time. He learned the news from a fellow scientist.

Klocek: “I thought he was nuts, literally. What are you talking about?”

Klocek says you have to understand, for a long time people ignored water treatment plants or they expected them to remove only the worst industrial pollutants.

Klocek: “I had no idea that waste water plants themselves could actually contribute to an improved ecology.”


Allee: “Maybe the opposite, they were putting chlorine in the water or bacteria, if they weren’t disinfecting.”

Klocek: “Absolutely, you know we hear constantly that technology is going to save us and I really don’t believe that. I think we put too much stock in that, but it sure is gratifying to see when there is some technology that makes a remarkable improvement.”

Klocek says, too often, people assume industrial areas like East Chicago will always be ecological basket cases.

He says, sure there’s room for improvement, but having one concrete example of something that works? That can give you hope about what nature can do if you give it a chance.

For The Environment Report, I’m Shawn Allee.

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A Battle Over the Treatment of Livestock

  • The treatment of laying hens is one part of the issue getting a lot of attention in Ohio. (Photo source: LEAPTOUY at Wikimedia Commons)

Recently, six states have changed their laws to require
better conditions for farm animals. But there’s a battle
brewing in one state that’s putting a new spin on the debate.
Julie Grant reports:

Transcript

Recently, six states have changed their laws to require
better conditions for farm animals. But there’s a battle
brewing in one state that’s putting a new spin on the debate.
Julie Grant reports:

The Humane Society of the United States says it’s shameful
the way animals are treated on many American farms. Paul
Shapiro says veal calves, pregnant pigs, and egg-laying
hens are all kept in cages so small – it’s cruel.

“Hundreds of millions of egg-laying hens in the nation are
confined in tiny battery cages that are so restrictive the birds
are unable even to spread their wings.”

Shapiro says some farms house millions of hens, all
squished into tiny cages, and none of them get the chance to
nest, or act in any way like natural chickens. The Humane
Society has spent millions of dollars pushing for change in
California and other states.

But when the Humane Society hit Ohio with its campaign,
the state Farm Bureau Federation pushed back.

Keith Stimpert is spokesman for the Ohio Farm Bureau. He
says there’s a reason cages are a certain size for hens,
calves, and pigs: the animals’ safety.

“You can expand space, but you’re going to increase
aspects of fighting or cannibalistic behavior, or the chance
for that sow to fall down while she’s pregnant.”

Stimpert says the Humane Society doesn’t understand
livestock.

So instead of negotiating with the Humane Society, the Ohio
Farm Bureau is proposing something new: a state board to
oversee the care of livestock.

“I think we, in this case, can get to a better resolution on
animal care by organizing this board.”

The board would include family farmers, veterinarians, a
food safety expert, and a member of a local chapter of the
Humane Society, among others.

Voters will probably be asked in November to decide
whether to change the state constitution to create this board.

But the Humane Society’s Paul Shapiro says the board will
be stacked by the Farm Bureau. He calls it a power grab by
big agriculture.

“Keep in mind that these are people who have opposed,
tooth and nail, any form of agricultural regulation for years,
and now, all of a sudden, in just a few weeks, they’ve gotten
religion and feel grave urgency to enshrine in the state’ s
constitution their own favored system of oversight.”

Shapiro says this board will only protect the status quo. And
that’s not good for the animals.

Egg producer Mark Whipple runs a small farm in Clinton,
Ohio. He’s got about 1,500 hens. We caught up with him
delivering eggs at a local health food store.

He says his hens are free range.

“There ain’t no cages, really. They go in the box, lay their
egg, and go out and run around with the rest of ‘em, go eat,
drink, I don’t know, just be free.”

Whipple says he was never inclined to cage the hens.

You might expect him to side with the Humane Society on
this debate. But he doesn’t trust them to make decisions for
farmers.

“I don’t know that they really know where their food comes
from – other than they go to the grocery store or they go to
the refrigerator. Unfortunately, that’s a lot the mentality of
the world right now, so far removed from the farm at all,
knowing about livestock.”

Whipple says there are good producers and bad producers
out there – just like any business. He would rather see a
board like the one proposed by the farm bureau than a
mandate on cage sizes from a Washington DC-based
lobbying group.

But the Humane Society says the board proposed by the
Farm Bureau won’t make things better. If it’s approved by
voters this November, the Society plans to place its own
initiative on animal treatment on the ballot next year.

Meanwhile, other farm states are considering the Ohio Farm
Bureau’s approach and might soon have their own advisory
boards on how to treat animals.

For The Environment Report, I’m Julie Grant.

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Should Zoos Keep Elephants?

  • Some zoos have stopped keeping elephants, because they feel they can’t provide the best care for them any more. (Photo by Lauren Humphries, courtesy of the National Biological Information Infrastructure)

News of a zoo being investigated and fined has reignited the debate over keeping elephants in captivity. Rebecca Williams reports:

Transcript

News of a zoo being investigated and fined has reignited the debate over keeping elephants in captivity. Rebecca Williams reports:

It’s just been revealed that the Los Angeles Zoo was fined for the death of an elephant back in 2006. The zoo does not admit any wrongdoing.

But some people believe keeping elephants in zoos is wrong.

Suzanne Roy is with the group In Defense of Animals. She says elephants in captivity often have foot problems from standing on hard surfaces.

“It’s just incredible the level of suffering these elephants are put through before they eventually literally can’t stand on their own feet or legs anymore.”

But the Association of Zoos and Aquariums says its zoos have to meet high standards of care for elephants.

Paul Boyle is the group’s senior vice president for conservation.

“There are no people more committed to keeping elephants in good health and humor than those professionals at zoos across the country.”

Some zoos have stopped keeping elephants. Some, because they feel they can’t provide the best care for elephants any more.

For The Environment Report, I’m Rebecca Williams.

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Lawn Chemicals Cause Concern

  • Nationwide, farms use the bulk of chemicals. But one expert says homeowners are more likely to overuse pesticides and fertilizers. (Photo by Rebecca Williams)

New laws restrict pesticides and fertilizers in some cities. In recent years, farms have cut the use of chemicals. But, Rebecca Williams reports, some environmentalists say there are still far too many chemicals polluting streams and lakes:

Transcript

New laws restrict pesticides and fertilizers in some cities. In recent years, farms have cut the use of chemicals. But, Rebecca Williams reports, some environmentalists say there are still far too many chemicals polluting streams and lakes:

There are 40 million acres of lawns and sports fields in the US. That’s only one-tenth of the amount of cropland.

But some experts say lawn pesticides and fertilizers can be more of a problem.

Charles Benbrook is the Chief Scientist with the Organic Center. It’s a non-profit research group in Oregon.

“While there are many more acres of corn and soybeans and cotton treated with pesticides than there are lawns, the rate of application on lawns in urban areas often is far higher than on the farm.”

And, he says people are more likely to get exposed to chemicals on lawns.

“There’s many more opportunities for significant exposures, particularly for children and pregnant women in urban areas.”

Nationwide, farms do use the bulk of chemicals. But Benbrook says homeowners are more likely to overuse pesticides and fertilizers.

For The Environment Report, I’m Rebecca Williams.

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Old LCD Screens Used for Medical Treatment

  • One research team recovered polyvinyl alcohol from the computer screens, which can be used in medicine (Photo courtesy of the National Cancer Institute)

Some researchers want to recycle
a chemical in computer screens to
use it for a medical treatment.
Shawn Allee reports:

Transcript

Some researchers want to recycle
a chemical in computer screens to
use it for a medical treatment.
Shawn Allee reports:

Most LCD computer screens contain toxic mercury. The European Union will soon mandate those screens be recycled rather than thrown away.

There are other metals and chemicals in the LCD screens that are not dangerous.

Dr. Avtar Matharu is with Britain’s University of York.

His research team recovered polyvinyl alcohol from the computer screens.

It’s used in spongy pads that deliver medicine.

“We can take out Polyvinyl alcohol from the front and back of an LCD screen. We can take what effectively would be a waste resource and potentially use it in a medical application.”

Matharu says getting polyvinyl alcohol out of LCD screens is expensive compared to making it from crude oil, but he says it could be another reason to recycle rather than throw them into a landfill.

For The Environment Report, I’m Shawn Allee.

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Using Honey for Healing

  • Stores in Alandejani's hometown of Ottawa have had an increase in sales of manuka honey after the study was reported (Photo by Karen Kelly)

According to the Centers for Disease Control, more than 90,000 Americans are diagnosed with an antibiotic-resistant infection each year. Doctors and patients are desperate to find an alternative treatment for these infections. Karen Kelly reports on the possibility of a new approach using a common household ingredient:

Transcript

According to the Centers for Disease Control, more than 90,000 Americans are diagnosed with an antibiotic-resistant infection each year. Doctors and patients are desperate to find an alternative treatment for these infections. Karen Kelly reports on the possibility of a new approach using a common household ingredient:

(sound of teapot and pouring)

A lot of us like to pour a cup of tea with honey when we’re feeling achy and stuffed up.

But researcher Talal Alandejani wondered if honey might be good for more than just soothing a sore throat.

He’s an ear, nose and throat doctor at the University of Ottawa in Canada.
He knew honey had been used on the skin for centuries to kill bacteria in wounds.
And he wondered if there might be a way to use it with his patients.

He treats people with chronic sinus infections that are resistant to antibiotics.

“I thought, what if I could use it in the sinus where we use antibiotics, but we still can’t get rid of the infection. It’s a natural product, it has less side effects and it’s less expensive.”

So, Alandejani chose four different types of honey:
clover and buckwheat honeys, which are common in North America,
Manuka honey, which is grown in New Zealand and sold mostly in health food stores,
and sidr honey from Yemen, which is hard for Americans to find.

He then grew bacteria in petri dishes.
Some were free-floating – the kind killed by antibiotics.
The others are called biofilms – they have a coating that resists medications, and they’re the cause of chronic sinus infections and other diseases.

Alandejani squirted the bacteria with antibiotics in one dish, and honey in the other.

The manuka and sidr honey -along with the medications – killed the free-floating bacteria.
The biofilms, though, were a different story.
The antibiotics didn’t kill them, but the honey did.

In fact, the two foreign honeys killed about 90% of the pseudomonas and 60 to 70% of MRSA bacteria. Both can cause deadly infections.

Alandejani presented his findings at the annual meeting of the American Academy of Oto-laryn-gology, Head and Neck Surgery.

And he was swamped with questions from doctors and sinus patients eager to try it.

“Even the patients in our clinics want us to treat them right now, before even doing the trials or the animal studies. And they’re willing to take the harm of it, if there is any, because their disease is not treated until now.”

Alandejani says the challenge is that the honey has to come in contact with the bacteria – so it would have to be diluted and injected into the sinuses.

Dr. Murray Grossan is an ear, nose, and throat doctor in Santa Monica.
He says the treatment looks promising.

“They do use honey for stomach problems, stomach ulcers and so on, so it probably would be pretty safe to put into the sinus. But unfortunately, we have to go through all sorts of protocol there.”


In the meantime, stores in Alandejani’s hometown of Ottawa have had an increase in sales of manuka honey after the study was reported.

It’s not cheap – manuka honey can cost as much as $50 a jar.

Alandejani says he used the regular manuka honey, nothing especially strong.
And he can’t vouch for it’s effectiveness if you just eat it.

But he’s now trying it on sinuses in animal studies.

And soon, his patients with chronic sinusitus will have their chance to try it as well.

For The Environment Report, I’m Karen Kelly.

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Who’s to Blame for the Dead Zone

  • It is predicted that the dead zone in the Gulf of Mexico is the size of the state of Massachusetts (Photo courtesy of NASA)

About 40% of the continental U-S drains into the Mississippi River. It sends water – and pollution – from across the country into the Gulf of Mexico. A new study shows just who the worst offenders are. Gabriel Spitzer has the story:

Transcript

About 40% of the continental U-S drains into the Mississippi River. It sends water – and pollution – from across the country into the Gulf of Mexico. A new study shows just who the worst offenders are. Gabriel Spitzer has the story:

All the pollution creates a dead zone in the Gulf nearly the size of New Jersey.

Nitrogen and Phosphorus pour in and fertilize big algae blooms.

When that stuff decays, it sucks oxygen out of the water, and makes it impossible for most fish to live there.

US Geological Survey researchers say most of the problem comes from farm runoff, but the single biggest source is sewage from Chicago.

Albert Ettinger with the Environmental and Law Policy Center says Chicago water managers have to catch up with their neighbors.

“They’re gonna have to look at treatment systems which take nitrogen out of the water, and bring phosphorus down to one milligram per liter. It’s done in Milwaukee, it’s done in Cleveland, it’s done in Detroit.”

Chicago’s Metropolitan Water Reclamation District say they haven’t had a chance to look closely at the study yet, so they don’t want to comment on it.

But they don’t like being singled out.

For The Environment Report, I’m Gabriel Spitzer.

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