Bacteria Engineered to Destroy Pollutants

  • Justin Gallivan and his team programmed a type of E. coli bacteria to seek out atrazine in a petri dish, and destroy it, but right now the bacteria is too weak to survive in the wild. (Photo courtesy of the National Institutes of Health)

Scientists have engineered bacteria to seek out and destroy a chemical that pollutes drinking water. Rebecca Williams has more:

Transcript

Scientists have engineered bacteria to seek out and destroy a chemical that pollutes drinking water. Rebecca Williams has more:

Atrazine is a pesticide used on corn, sorghum and sugar cane. It’s one of the most common chemicals polluting water supplies in the US.

Justin Gallivan is a chemist at Emory University. His team genetically engineered a type of E. coli bacteria. They programmed it to seek out atrazine in a petri dish… and destroy it.

He says right now, this engineered bacteria is too weak to survive in the wild.

“It requires quite a bit of care and feeding, as you might say, to survive even in a petri dish. So if it were placed in a more harsh environment, it is extremely likely that these types of organisms would not survive.”

He says using this kind of genetically engineered bacteria to clean up pollution is still a long way off.

For The Environment Report, I’m Rebecca Williams.

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Keeping Your Lawn From Bugging You

  • There's a movement to stop using pesticides and sprays on your lawn. (Photo courtesy of Horia Varlan CC-BY)

A lot of us have a love-hate relationship with our lawns. We love them when they’re lush. We hate them when they’re full of dandelions and dead patches. It’s easy to have someone come out and spray pesticides to take care of weeds and bugs. But some people say it’s not necessary and could do more harm than good. Rebecca Williams reports:

Transcript

A lot of us have a love-hate relationship with our lawns. We love them when they’re lush. We hate them when they’re full of dandelions and
dead patches. It’s easy to have someone come out and spray pesticides to take care of weeds and bugs. But some people say it’s not necessary and could
do more harm than good. Rebecca Williams reports:

So, you might be using pesticides on your lawn right now. And of
course, the pesticide industry says that’s okay.

The industry says the chemicals are safe to use on the lawn if you use
them correctly.

Alan James is president of Responsible Industry for a Sound
Environment, or RISE. It’s a trade group for pesticide companies.

“If individuals or professional applicators read the labels and follow
labels, the likelihood of misuse of pesticides is virtually zero because the
labels provide all the information a consumer or professional needs to
apply products both efficiently and safely.”

But the problem is, not everybody reads the label.

Alan James says if you’re hiring someone to spray your lawn you should
make sure they’re certified and insured. You should also take your kids’
and pet’s toys off the lawn before they spray.

But a lot of people say there’s no point in using chemicals just to make
your lawn look good.

Jay Feldman is with the group Beyond Pesticides. He says of the 30
most common lawn pesticides, most of them are suspected by the
Environmental Protection Agency to cause cancer, birth defects or other health problems.

“There’s a range of adverse effects that are indicated as a part of the
pesticide registration program at EPA. EPA knows this information.
Why not remove pesticides from the equation, especially in light of the
fact that they’re not really necessary?”

There’s a movement to stop using pesticides in North America. Both
Ontario and Quebec have banned the sale and cosmetic use of
pesticides.

So if you’re not going to use pesticides, what do you do?

That’s a question Kevin Frank gets a lot. He’s an extension agent at
Michigan State University and an expert on lawns.

“I love to mow my lawn on the weekends because nobody can call me on
the phone or email me with questions.”

He’s been showing me green, healthy test plots of grass and some that
look sad and neglected. The scientists here have been working to find
ways to have good-looking lawns without a lot of chemicals.

Back in his office, Kevin Frank says he tells people they shouldn’t be
afraid to experiment.

“Do you have it in you to let it go for one season and see what happens?
And it could be ugly, so you’ve got to be prepared for that!”

He says a healthy, dense lawn is actually really good at fighting off
weeds and pests all on its own. So, how do you get a healthy, dense lawn
without a lot of chemicals? Frank says it might take a couple years to get
there. And it means going against conventional lawn advice.

“We’ve done a great deal of research here at Michigan State that runs
contrary to what I call ‘turf dogma’. You know: water deeply and
infrequently – and we’ve shown if you do it on a more frequent basis you
end up with a healthier plan overall.”

He recommends watering lightly – just 10 minutes – every day instead
of soaking the lawn once a week. Frank says it’s also good to fertilize
twice a year, use a mulch mower, and mow high instead of giving the
grass a buzz cut.

He says that could make your lawn so healthy, it might mean you won’t
need to spray or hire someone to spray your lawn.

He says the biggest adjustment in reducing pesticide use is managing
your expectations, and deciding how many weeds and bugs you can live
with.

For The Environment Report, I’m Rebecca Williams.

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EPA Restricts Rodent Pesticide

  • New regulations will keep certain pesticides out of residential areas, hospitals, and daycare centers or schools.(Photo courtesy of Ordered Chaos CC-2.0)

The feds are cracking down on a pesticide linked to the deaths of two little girls. Lester Graham reports the poison is used to kill burrowing rodents.

Transcript

The feds are cracking down on a pesticide linked to the deaths of two little girls. Lester Graham reports the poison is used to kill burrowing rodents.

The Environmental Protection Agency is restricting use of the pesticide after two young girls in Utah, a four-year-old and a 15-month-old, died. Phosphine fumigants in the form of poisoned pellets had been used near their home. With this new restriction, the pesticide cannot be used in residential areas.

“It’s not okay at all.”

Marty Monell is the EPA’s Deputy Director of the Office of Pesticide Programs.

“So, there’s no residential use, no use around hospitals or daycare centers or schools.”

The one exception is on athletic fields with certain restrictions.
Those pesticides can still be used to kill bugs in grain bins and silos and for rodents on farms and orchards.

For The Environment Report, I’m Lester Graham.

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EPA Questions Pet Pesticides

  • The EPA plans to develop more stringent testing and evaluation requirements for both existing and new products.(Photo courtesy of Isiegert CC-2.0)

Tens of thousands of pets are getting sick when their owners use flea and tick pesticides the wrong way. The Environmental Protection Agency wants the companies to change the directions on the labels. Rebecca Williams has more:

Transcript

Tens of thousands of pets are getting sick when their owners use flea and tick pesticides the wrong way. The Environmental Protection Agency wants the companies to change the directions on the labels. Rebecca Williams has more:

EPA officials are concerned about spot-on pesticides for fleas and ticks – the drops you put on your pet’s back.

EPA has been investigating these products because of a recent huge jump in reports of negative effects on pets. Most are mild… such as skin irritation. But there have also been reports of vomiting, seizures and in some cases, death.

Steve Owens is with the EPA. He says these products are poisons. And he says the labels are not always clear.

“The consumers in many cases were left to guess for themselves the appropriate amount to be used on their particular pet.”

The EPA is working with companies to put more detailed directions on the labels.

In the meantime, Owens says you should be really careful about reading the directions. He says it’s especially important not to use dog products on cats.

For The Environment Report, I’m Rebecca Williams.

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Greening the Golf Course

  • Audubon International estimates the average American golf course uses 312,000 gallons of water a day. (Photo source: Easchiff at Wikimedia Commons)

This time of year, golfing might be
the furthest thing from your mind.
But during the off-season, golf course
managers get to strategize how to best
treat their million dollar turf. Some
golf courses have a bad rap with
environmentalists. But, as Tanya Ott reports, there’s a budding
green movement in the golf industry:

Transcript

This time of year, golfing might be
the furthest thing from your mind.
But during the off-season, golf course
managers get to strategize how to best
treat their million dollar turf. Some
golf courses have a bad rap with
environmentalists. But, as Tanya Ott reports, there’s a budding
green movement in the golf industry:

Golf courses take knocks for using too many chemicals and too much water. Audubon International estimates the average American golf course uses 312,000 gallons a day.

Gil Rogers is with the Southern Environmental Law Center. He says that’s a boatload of water.

“In Georgia, they’re defined as agriculture – which doesn’t make any sense – but that allows them to use a lot more water than they would otherwise be able to.”

That can be a problem, especially in places with water shortages. Places like Atlanta, where a federal battle over water rights might soon leave the city high and dry.

(sound of rain hitting metal roof)

Of course, on this day, water doesn’t seem like much of a problem. It’s been raining all night. I’ve come to the Stone Mountain Golf Course, just outside Atlanta, to talk to superintendent Anthony Williams. He won golf’s highest environmental stewardship award this year.

(sound of power screwdriver)

Technicians raise the reels on the mowers to help protect the wet turf. Williams says it’s been a tough fall. In October, a big storm – they call it the 500 year storm – dropped 16 inches of rain on Stone Mountain in one day. Williams says the only thing that saved his course were the acres of native plants.

“When that flood – literally – came into the property, those plants did exactly what nature created them to do. They fluffed out. Fanned out and really just acted like a sponge.”

When Williams took over a few years ago he ripped out the non-native ornamentals and replaced them with native perennials that don’t require any additional watering. Just rain.

(sound of rain on roof)

Stone Mountain isn’t just using less water. It’s also using fewer chemicals. Williams’ crew is creative. Take, for instance, one of their big problems: wild geese. They can do a lot of damage to million dollar turf.

“We refer to it as the in-and-out damage. The ‘in damage’ is when they’re actually eating the grass and physically tearing the green up. The ‘out damage’ is as they’re walking, well, (laugh) the eaten grass becomes, well, goose droppings and then the cleanup is very, very difficult.”

Conventional golf courses spray foul-tasting chemicals on the grass or light fireworks overhead to scare the geese. But at Stone Mountain, their secret weapon is a 13 year old hound dog named Cushman. When the geese see Cushman coming, they think he’s a predator. Williams says it works like a charm!

This focus on environmental stewardship is paying off financially. Anthony Williams says they’re using significantly less fertilizer and insecticides. He estimates they’ve saved nearly $50,000 on chemicals in the last two years.

How confident is he about the health of his golf course? I asked him if he was willing to put his course to the test. Apparently, some old-school players still lick their golf balls to clean them. Not a good idea when there’re pesticides on the grounds. Would Williams do it now?

“There’s a lot of things in nature that you probably wouldn’t want to eat or put in your mouth. So the golf ball’s going to encounter a lot of those along the way. I would definitely line up with the ‘do not lick your balls.’ I’m gonna be on that side of the fence.”

More golf courses are starting to look at their environmental impact for the first time. They’re planting different grasses.

And nearly 1,000 US golf courses use recycled or reclaimed water. Another reason not to lick your balls.

For The Environment Report, I’m Tanya Ott.

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Bedbugs Booming

  • Complaints to pest control firms about bedbugs have tripled in 4 years. (Photo courtesy of the CDC)

The US is suffering through a
resurgence of bedbugs and the itchy
welts their bites cause. So now,
some health officials are asking
the Federal EPA to bring back an
old pesticide. Bill Cohen reports:

Transcript

The US is suffering through a
resurgence of bedbugs and the itchy
welts their bites cause. So now,
some health officials are asking
the Federal EPA to bring back an
old pesticide. Bill Cohen reports:

Complaints to pest control firms about bedbugs have tripled in 4 years.

Two reasons. More people are scavenging infested mattresses thrown out on the street. Plus, the bugs are getting resistant to current pesticides.

That’s why Ohio is asking the feds to let home exterminators use propoxur. Red tape and questions over possible side effects like nausea shelved the pesticide years ago, but local health official Paul Wenning fears, without it, frustrated itchy homeowners will turn to more dangerous weapons to fight the bugs.

“Our greatest fear is that someone is going to get ahold of some old pesticide – like DDT or something – are going to treat their house, and we’re going to have a lot of very sick and possibly dead people.”

Ohio expects other states will join the drive to bring back propoxur.

For The Environment Report, I’m Bill Cohen.

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Veterans’ Benefits for Agent Orange Exposure

  • A poster from the Department of Veterans Affairs offering help and resources to veterans exposed to Agent Orange. (Photo courtesy of the Department of Veterans Affairs)

The US Department of Veterans
Affairs is offering new help to
Vietnam-era vets. The VA says
it can now assist vets who have
ailments related to Agent Orange
exposure. Mark Brush has more:

Transcript

The US Department of Veterans
Affairs is offering new help to
Vietnam-era vets. The VA says
it can now assist vets who have
ailments related to Agent Orange
exposure. Mark Brush has more:

During the Vietnam War, the herbicide known as Agent Orange was sprayed over jungles and forests. It was used to strip the leaves from the trees and expose enemy soldiers.

Some US soldiers who were exposed to the herbicide have long complained about health problems.

Now, the Department of Veterans Affairs says it will help these veterans with disability benefits.

Exposure to Agent Orange has been tied to health problems like parkinson’s disease, cancer, and heart problems.

Allan Oates is with the US Military Veterans with Parkinson’s. He served in Vietnam. And was exposed to Agent Orange. He says his group was thrilled by the VA’s decision.

“It was just an exhilarating feeling to have these people knowing that they were going to get the help that they deserved.”

Oates says many Vietnam era veterans don’t know yet that help is available to them.

The VA estimates that 2.6 million military personnel were potentially exposed to sprayed Agent Orange.

For The Environment Report, I’m Mark Brush.

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Interview: The Incomparable Honey Bee

  • A Honey Bee. (Photo source: Erik Hooymans at Wikimedia Commons)

You could thank a honeybee for the last meal you ate. Bees help produce about one out of every three bites we eat. But worldwide bees are dying at a rate never seen in history. Lester Graham talked with Reese Halter about the decline of the honeybee.
Doctor Halter is a biologist and the author of the book The Incomparable Honeybee and the Economics of Pollination:

Transcript

You could thank a honeybee for the last meal you ate. Bees help produce about one out of every three bites we eat. But worldwide bees are dying at a rate never seen in history. Lester Graham talked with Reese Halter about the decline of the honeybee.
Doctor Halter is a biologist and the author of the book The Incomparable Honeybee and the Economics of Pollination:

Doctor Reese Halter: We do know that we have a problem. 50 billion bees are missing.

Lester Graham: What kind of economic benefit is the bee to food production in, let’s just say, the US?

Halter: Enormous. I’ve given conservative numbers for food, for medicine, for clothing. Directly, the honeybee accounts for, at least, 44 billion per anom. Now, if you go to the cotton growers’ main site, they’ll tell you that, in cotton alone, America does well over 100 billion in commerce. The cotton plant cannot exist without the bee.

Graham: Now, bees have been hurt in the last few decades. We’ve seen a couple of different invasive mites really decimate the bee population, and now we’re seeing this colony collapse disorder. Can you tell us what you think some of the causes might be?

Halter: There’s no one smoking gun. We’ve got a collision of events that have happened. We have insecticided, fumigated, miticided, pesticided ourselves almost right through oblivion. We’ve got electromagnetic radiation coming at them. We truck bees on semi-tractor trailers around our nation – they’re on, like, a Nascar circuit – where we don’t even allow them, for goodness sakes, to eat honey, we stoke them up with high-fructose and corn syrup, because it costs too much to feed them honey, for goodness sakes. And they’re sick. We’re overworking them. We’re losing billions of them. And we’ve reached a point now where there are mites, where there are bacterias and viruses, and, at the end of the day, not dissimilarly to human-beings, the bees’ auto-immune systems are shutting down.

Graham: What can we do about that?

Halter: In a nutshell, I think we need to step back here, and we need to look at all the different problems. And I think where I get really excited, Lester, is corporate America – corporate America – gets this. And they get it with Sam’s Club, they get it with Safeway, because organics – organics – you know, we can grow stuff. We can grow anything without having to nuke the Earth with petro-chemical-derived fertilizers and insecticides. When we ramp the scale of economy up, as we’ve done throughout America, in our supermarkets, and, incidentally, organic foods and organic products are the fastest growing in the United States of America. 24 billion last year. So when it ramps up the price per unit goes down. And there are all these organic bays in almost every food store now. So, please, consider supporting it. Certainly buy organics in season. And, it is very affordable.

Graham: Reese Halter is the author of ‘The Incomparable Honeybee’ published by Rocky Mountain Press. Thanks for talking with us.

Halter: Thank you, Lester.

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Great Lakes Fish Linked to Diabetes

  • DDT was banned in 1972, but traces of it are still all over the place - including in Great Lakes fish. (Photo courtesy of Tony Arnold)

Scientists have known for a long time
that a lot of wild-caught fish have
dangerous contaminants. People
who eat fish have to weigh the health
benefits against the risks of consuming
those pollutants. Now, some research
could make that balancing act even
trickier. Gabriel Spitzer has more on
the link between diabetes… and an
infamous old chemical many assumed
was long gone:

Transcript

Scientists have known for a long time
that a lot of wild-caught fish have
dangerous contaminants. People
who eat fish have to weigh the health
benefits against the risks of consuming
those pollutants. Now, some research
could make that balancing act even
trickier. Gabriel Spitzer has more on
the link between diabetes… and an
infamous old chemical many assumed
was long gone:

In the early morning hours, anglers gather on Navy Pier in downtown Chicago.

Ray Penn is practically within casting distance of the city’s skyscrapers.

He dips his line in the waters of Lake Michigan, hoping to pull out something tasty.

“I filet ‘em, and I fry ‘em, yeah. They got a little bit of bones in ‘em, but – oh yeah. Oh, yeah, baby! I felt that!”

It’s looking like a good morning for rock bass.

“See, there’s a bass on the end of this. This is a small bass, now this guy here, he’s edible.”

Penn says he eats fish a couple of times a week, without giving it a second thought.

Down the pier, Patrick Duhan has the same attitude.

“This is the Great Lakes! It’s such a big body of water. It’s almost like the ocean. They throw tons of crap in the ocean, and there’s just too much of it to screw up.”

But, scientists say, people have managed to screw up the Lakes a fair amount.

Epidemiologists have been studying a group of sport fishers, like these guys, and charter boat captains, who eat a lot of Great Lakes fish.

Mary Turyk of the University of Illinois at Chicago measured the contaminants in their blood, and tracked their health over the years.

“We found we had 36 cases of new diabetes. And what we found was that DDE, the metabolite of DDT, was related to diabetes incidence.”

DDT.

That’s the pesticide made famous by Rachel Carson’s book, “Silent Spring.”

The chemical was banned in 1972, but traces of it are still all over the place – including in fish.

And like mercury or PCBs, it concentrates as it moves up the food chain.

So you don’t have to eat much.

“The captains were eating, I think, on average, a meal a week. One meal a week? Yeah. That doesn’t seem outlandish or anything. No, it doesn’t. It doesn’t at all. In fact, recommendations from the FDA for eating fish, based on mercury levels, are two meals per week, for pregnant women.”

So just half that much fish was linked to about a 33% increase in diabetes cases.

Turyk says it’s not clear how DDE or DDT might contribute to diabetes.

It may have to do with effects on hormones or the immune system.

“We really need more basic science to determine mechanisms that might be responsible for this.”

Another unknown is just how dangerous might this be, and when does it start to outweigh the advantages of an otherwise healthy food?

Tamara Duperval is a family doctor at a West Side Chicago clinic.

She says she still tells people to eat more fish.

“In our population, it’s really a wonder and a challenge to try to present fish as an option, when primarily the staple of diet is either chicken or beef.”

That population is mostly low-income and minority.

She says about half are overweight or obese.

From a nutrition point of view, those are exactly the people you’d want to be eating a lean, healthy protein like fish.

So Duperval is concerned about sending mixed messages.

“I do think it is confusing. And, it’s in part, I think, how we communicate crisis in this country, especially when it comes to food safety. They miss the overall preventative message, that fish is good food, and it actually provides a lot of important nutrients that are lacking in their diets.”

Health authorities often issue advisories about certain fish that have a lot of pollution.

Duperval says understanding those warnings can help people avoid some of the hazards.

But the diabetes research shows we may still have a lot to learn about these chemicals, so what’s safe to eat is getting harder to know.

For The Environment Report, I’m Gabriel Spitzer.

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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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