New Microbe Munches Pollutants

Trichloroethaneor TCA, is a solvent that contaminates groundwater and erodes the ozone layer. It is present at many polluted sites across the country. TCA comes from many common products such as glue, paint and industrial degreasers. Now scientists say they’ve found a microbe that can help clean it up. The Great Lakes Radio Consortium’s Tamar Charney reports:

Transcript

Trichloroethane or TCA is a solvent that contaminates groundwater
and erodes the ozone layer. It is present at many polluted sites across
the country. TCA comes from many common products such as glue,
industrial
degreasers, and aerosol sprays. Now scientists say they’ve found a
microbe
that can help clean it up. The Great Lakes Radio Consortium’s Tamar
Charney reports:


One way polluted water can be cleaned is to add bacteria that breaks
down the harmful substances. It is a process called bioremediation. In a
recent issue of “Science,” researchers at Michigan State University say
they’ve identified a microbe that could do this with TCA. Benjamin
Griffin is a doctoral student who worked on the project. He says they
found the bacteria in sediment in the Hudson River.


“They actually breathe TCA, so they respire it. They’re using this
chlorinated compound in the same way we use oxygen.”


The bacteria breaks down the TCA into other compounds. Those chemical
compounds can then be further broken down by other pollution-eating or
breathing bacteria. Up until now, scientists though there might not be
a
way to biodegrade TCA. For the Great Lakes Radio Consortium, I’m Tamar
Charney.

New Bubble Barrier to Repel Asian Carp?

The Asian carp is threatening to invade the Great Lakes. Right now there’s an electric barrier in the Chicago canal to stop the fish from getting into Lake Michigan, but a new study shows it’s not 100-percent effective. As the Great Lakes Radio Consortium’s Annie Macdowell reports, scientists are working on a second line of defense…bubbles:

Transcript

The Asian carp is threatening to invade the Great Lakes. Right now there’s an
electric barrier in the Chicago canal to stop the fish from getting into Lake
Michigan, but a new study shows it’s not 100% effective. As the Great Lakes
Radio Consortium’s Annie Macdowell reports, scientists are working on a second
line of defense – bubbles.


In a recent experiment by the Illinois Natural History Survey, a startled Asian
carp swam straight through an electric field like the one in the Chicago Canal.


The International Joint Commission is bringing specialists from Britain to build
an experimental acoustic bubble barrier and test it on the Asian carp. It works
like this: a pump filled with air and sound expels bubbles with sound trapped
inside.


Bill Moy of the Wisconsin Sea Grant says the process creates a nearly seamless
barrier.


“If you just project sound into the water, it’s not like a wall of sound. But by
entraining the sound in this bubble, you can actually create a wall of sound in
the water that’s much more uniform.”

Moy says the infrasound inside the bubbles is like an idling truck – you can feel it
more than you hear it.


The fish can’t find a break in the sound, so they turn around.


The International Joint Commission says if they decide to install the bubble
barrier, it won’t be until the spring.


For the Great Lakes Radio Consortium, I’m Annie MacDowell.

The Dawn of Smell-O-Vision

In the animal kingdom, a sense of smell is a useful tool. We can tell whether our food is fresh, our clothes are clean… and we might even choose a mate by their scent. Soon, marketers may try to attract your nose to their products. But like too much noise, too many smells may be a turn-off. Great Lakes Radio Consortium commentator Tom Dunkel doesn’t mind that he’ll miss out on this new kind of pollution:

Transcript

In the animal kingdom, a sense of smell is a useful tool. We can tell whether our food is fresh, our clothes are clean… and we might even choose a mate by their scent. Soon, marketers may try to attract your nose to their products. But like too much noise, too many smells may be a turn-off. Great Lakes Radio Consortium commentator Tom Dunkel doesn’t mind that he’ll miss out on this new kind of pollution.


The nose knows more than we think it does. Studies have shown humans secrete the same chemical scents called “pheromones” that trigger things like aggression and mating in the animal kingdom. What does that mean? Well, it means that by mixing the smells of lavender and pumpkin pie, researchers in Chicago were able to sexually arouse a test group of men… a test group of, apparently, very lonely, embarrassed men. Its private industry’s job is to try and cash in on scientific discoveries. Which explains why a patent has been issued for a little device that attaches to a TV, computer, or stereo. The sole purpose of this little gizmo is to generate odors that enhance what we see and hear on our TVs, computers, and stereos. Yes…. It’s the Dawn of Smell-o-Vision! And it’s only a matter of time until it produces a new, annoying form of environmental pollution.


Someday soon grocers will be spritzing supermarket aisles with chocolate-based fumes…. fumes that fill shoppers with a heroin-like craving for Coco Puffs. Airline industry scientists will discover that the combined smell of fruitcake and varnish make passengers actually want to stand in line for hours at ticket counters. We’ll be begging for flight delays. Some future presidential candidate will get catapulted into office by winning the scratch-n’-sniff-campaign-button vote.


Fortunately, I’m going to miss out on this brave, new, environmentally manipulated world. I’m going to miss out because I’m one of about 3 million Americans who have no sense of smell. People like you…. normal people…. enjoy a symphony of 10,000 different odors. My world of smell is a one-note song: ammonia. Eye-watering, sinus-scorching ammonia…the nasal equivalent of having ears that can only hear blood-curdling screams. As handicaps go, I admit I have a minor one. Ragged men don’t stand on street corners mumbling, “Hey, buddy, can you spare a dollar for a guy who’s never smelled fresh-baked bread?” But being born without a sense of smell has very practical, very anxiety producing implications. I have left chicken pot pies baking in the oven all night long…. cooked them no, incinerated them – until a neighbor stopped by to ask if my kitchen was on fire. Likewise, I can’t tell if I’ve worn a suit two times or 20 times. Imagine sitting in a business meeting, brimming over with earth-shattering, big ideas…but convinced nobody will listen to those Big Ideas because you smell like a high school gym locker.


I long ago accepted the fact that my nose can’t distinguish a rose from road kill. But after all these years – not being able to smell has suddenly developed a bright side: No company is going to manipulate my environment. I am totally immune to Smell-o-Vision. Better yet: No matter what those wacky, test-group scientists do, I will never, ever, get sexually aroused by a piece of pumpkin pie.

Groups Gather to Discuss Alvar Protection

This week (week of June 8th), an international group of scientists, policy-makers, and conservationists will gather in Tobermory (TOE-burr-mor-ee), Ontario to discuss strategies for protecting one of world’s rarest and least publicized habitats—the alvar. The Great Lakes Radio Consortium’s David Hammond reports:

Potato Plague Resurgence

The fungus responsible for the Irish Potato Famine that claimed more than one million lives in 1840 is back and stronger than ever. Scientists are warning American potato growers to beware. The Great Lakes Radio Consortium’s Steve Frenkel has the story: