Tag: underground

Geothermal at Home

  • Swimmers in Iceland enjoy the toasty Blue Lagoon hot springs. (Photo by Kurt Holtz)

You might be hearing about geothermal energy more and more. But what exactly is geothermal energy? The new federal Energy Act calls for more research and investment into the alternative energy source. Robbie Harris has more on this long used, but little known technology, for tapping the earth’s heat:

Transcript

You might be hearing about geothermal energy more and more. But what exactly is geothermal energy? The new federal Energy Act calls for more research and investment into the alternative energy source. Robbie Harris has more on this long used, but little known technology, for tapping the earth’s heat:


(“Now look at that!” “Wow!”)


(whooshing of geyser)


In Iceland, where geysers gush from the ground and steam rises from the bays, geothermal is the number one source of energy. This island nation in the north Atlantic burns virtually no fossil fuel to heat or cool its buildings.


“You will probably not see a building that is not heated by geothermal
energy during your visit here.”


Pall Valdimarsson is Director of Research and Development with Enix. It’s Iceland’s largest geothermal consulting firm.


“And I myself, I have never lived in a house in Iceland without geothermal
energy, not in my whole life and I am not the youngest one as you can see.”


Valdimarsson says Iceland has used a special technology to tap earth-generated heat since the 1930s. And why not? It’s everywhere on this volcanic island. The first settlers here in the eighth century saw what they called “smoke” rising from the hot springs.


Today, steam blasts from hot water wells at Iceland’s newest, state of the art geothermal plant. The steam spins turbines to make electricity. The superheated water is piped directly into buildings where it gives up its heat. This heat exchange is the core concept behind geothermal technology.


Hans Bennimidgel is a spokesman for the power plant. He says the benefits for Iceland are simple:


“Clean energy and dirt cheap.”


Few places have the hot water resources Iceland has. But according to the Geothermal Resource Council, superheated water is available virtually anywhere in the world, if you drill deep enough.


The U.S. already taps this underground hot water to produce more geothermal electricity than Iceland does. And that’s expected to grow sharply, but for decades Americans have also used a different form of geothermal energy to heat
and cool buildings.


Erik Larson is a vice-president of Indie Energy. He calls it the other geothermal, which is, basically:


“Free heat from the earth and an extremely efficient way to eject heat from
the building in the summer time.”


Larson says geothermal, or geo-exchange systems, are comparable to traditional
heating, ventilation and cooling systems. But they use the earth’s constant underground temperature — around 55 degrees in most of the U.S. — to take the edge off a building’s heating and cooling load:


“Geothermal heat pump technology like we’re talking about can be done
anywhere in the country. Anywhere where there is ground to drill we can
put in our closed loop wells to draw heat from the earth to provide an HVAC
system.”


For a long time in rural areas, large horizontal loops several feet
underground captured and released heat. But in urban areas, there wasn’t
enough land. Now Larson says Indie Energy uses a new drilling technique
known as a vertical closed loop system. He says they can be installed under
almost any building. Pipes inside wells hold a fluid, which continuously
circulates between the ground and the building — creating a heat exchange.
Larson says a geothermal system saves owners money:


“We are a system that you would fully own through the ground loops or these
wells that we put in…through the distribution which is basically happening
within your building. So it adds value to your property, you control it and you
take advantage of all the savings.”


Larson says geothermal systems for buildings cost anywhere from 50 to 100 percent more than a typical heating, cooling, and ventilation system. But he says, most pay for themselves in five to eight years with the energy savings.


Business is booming. Larson says Indie Energy plans to expand in two new locations this year. Four months ago, they installed a large geothermal system at Boocoo Community Center in Evanston, Illinois. During the installation, they helped train new workers in geothermal technology. It was a joint project between Indie Energy and Boocoo. They’re training workers for a new green industry they hope will not only save resources, but create new jobs.


(Sound of hammers in Community Center)


For the Environment Report, I’m Robbie Harris.

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E-85 Pumps Not Ul Safe

  • Gas station pumps and underground storage tanks are not yet UL certified to handle E-85. (Photo by Lester Graham)

With thousands of flex-fuel vehicles hitting the road, gas stations are adding E-85 to
their fuels. E-85 is 85 percent ethanol and 15 percent gasoline. But, as Lester
Graham reports, storing and pumping E-85 fuel is a major concern because, so far,
no equipment has been certified as safe to handle it:

Transcript

With thousands of flex-fuel vehicles hitting the road, gas stations are adding E-85 to
their fuels. E-85 is 85 percent ethanol and 15 percent gasoline. But, as Lester
Graham reports, storing and pumping E-85 fuel is a major concern because, so far,
no equipment has been certified as safe to handle it:


The Department of Energy’s Handbook for Handling, Storing, and Dispensing E-85
warns, “certain materials commonly used with gasoline are totally incompatible with
alcohols.” Other government guidelines give detailed instructions about storing E-85
in underground storage tanks and the pumps people use to fill their vehicles. But,
with more and more filling stations adding E-85 pumps, not everyone is following the
instructions and warnings.


Brad Hoffman is with the nation’s largest underground storage tank service
company, Tanknology. The company inspects gas station distribution systems:


“I think they pretty much just took for granted that their tank could store whatever
fuel they put into it and they didn’t really check the compatibility of the tank and the
other piping and dispensing equipment. They didn’t really confirm that it was
compatible with the E-85 that was being delivered.”


And some of the fiberglass underground storage tanks are not compatible. Ethanol
can soften the polymers in certain tanks. That can make them weaker and might
cause them to leak. There’s also concern that leak detection equipment might also
be damaged by ethanol. So if a tank is leaking, it might go undetected. And it’s not
just the tanks. There are questions about compatibility with the pumps filling flex-fuel
vehicles.


The ethanol industry says there have been no major problems with tanks or pumps
so far. Matt Hartwig is with the Renewable Fuels Association:


“Most gas station operators will use tanks that are appropriate. They will clean the
tanks. They would do the proper maintenance and the proper preparation required
to install E-85 infrastructure. Because of the nature of ethanol, you do need a
dedicated tank and pump system to dispense the fuel. I don’t think consumers and
the American driver have anything to fear.”


But fuel tank and gas pump inspectors are not as sure. Brad Hoffman with
Tanknology says government guidelines give checklists of recommendations on how
to prepare tanks and pumping systems:


“Being realistic, I think there’s a chance that some marketers may, you know, for
whatever reason, may not thoroughly check each of those items. And there could be
some problems, either with the tanks or the dispensing systems.”


Problems that could cause leaks.


Underwriters Laboratories is the safety testing organization that certifies the safety of equipment storing and pumping fuels. John Drengenberg is with
UL. He says it was only last year that a manufacturer asked for requirements for equipment handling E-85. Drengenberg says old gasoline equipment might not
be safe to pump E-85:


“The alcohol is different in that it’s much more corrosive. We know for a fact that
alcohol will attack soft metals, in particular aluminum and copper, things of that type,
and even plastics. So, therefore, what worked for gasoline dispensers, may not work
for ethanol dispensers.”


Drengenberg says gaskets, seals, and o-rings in the pump, hose or handle could
deteriorate and mean leaking fuel at the pump:


“With this type of fuel, ethanol, we’re mostly worried about fire hazards. If there is a
leak – let’s say for some reason ethanol attacked a gasket or a seal on a dispenser,
you could have a fuel leak – the fuel leak could be very dangerous in that any spark
could set it off. You could have a fire or possibly an explosion. So, that is the
concern that we have, certainly. And that is why we’re developing requirements for
these ethanol dispensers.”


UL expects to issue requirements for equipment by the end of the year. In the
meantime, whether the tanks and pumps offering E-85 at your gas station are safe is
up to the judgment of the local fire chief, fire marshal, or other local official.


For the Environment Report, this is Lester Graham.

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Groundwater Study Finds Low Voc’s

Federal researchers have detected Volatile Organic Compounds, or VOC’s, in many of the nation’s underground drinking water supplies. But the samples showed lower concentrations of the cancer-causing chemicals than some suspected. The GLRC’s Erin Toner reports:

Transcript

Federal researchers have detected Volatile Organic Compounds, or
VOC’s, in many of the nation’s underground drinking water supplies. But
the samples showed lower concentrations of the cancer-causing
chemicals than some suspected. The GLRC’s Erin Toner reports:


Volatile Organic Compounds are by-products of industrial and
commercial applications. They come from plastics, paints, dry-cleaning
products and gasoline.


Over the past few decades, researchers have detected many places in the
country where soil and groundwater is highly contaminated by VOCs.
This latest study by the U.S Geological Survey took a broader look at
VOC concentrations in the nation’s groundwater.


John Zogorski led the project.


“In most of the wells that we sampled, and we’re sampling before any
treatment by the water utilities, we didn’t find any of these 55
compounds using even our most sensitive analytical methodology.”


Zogorski says VOC’s were found in some drinking water wells, but he
says the good news is that where the VOC’s were found, they were
mostly below federal drinking water standards.


For the GLRC, I’m Erin Toner.

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Rethinking Water Runoff Design

  • Rainwater that falls on paved areas is diverted into drains and gutters. If the rainfall is heavy enough, the diverted water can cause flash flooding in nearby rivers and streams. (Photo by Michele L.)

Some planning experts are worried that the rapid development in cities and suburbs is paving over too much land and keeping water from replenishing aquifers below ground. The Great Lakes Radio Consortium’s Lester Graham
reports:

Transcript

Some planning experts are worried that the rapid development in cities and suburbs is
paving over too much land and keeping water from replenishing aquifers below ground.
The Great Lakes Radio Consortium’s Lester Graham reports:


In nature… when it rains… the water slowly soaks into the ground and makes its way
through the soil and rock to eventually be stored as groundwater. Some of it makes its
way underground to be stored in aquifers. And some of it slowly seeps through the rock
for a while and then resurfaces as springs to feed streams during times when there’s not a
lot of rain. It’s a natural storage system and a lot of cities rely on that water.


But when we build buildings and houses and parking lots and roads, a lot of the land
where the rain used to soak into the ground is covered up. Instead the rainwater runs off
the hard surfaces and rushes to stormwater gutters and ditches and then overloads creeks
and rivers. Even where there are big expansive lawns in the suburbs… the rain doesn’t
penetrate the ground in the same way it does in the wild. The grass on lawns has shallow
roots and the surface below is compact… where naturally-occurring plants have deep
roots that help the water on its way into the earth.


Don Chen is the Executive Director of the organization Smart Growth America. His
group tries to persuade communities to avoid urban sprawl by building clustering houses
and business districts closer together and leave more natural open space.


“With denser development you have a much lower impact per household in terms of
polluted runoff.”


Chen says the rain washes across driveways and parking lots, washing engine oil, and
exhaust pollutants straight into streams and rivers instead of letting the water filter across
green space.


Besides washing pollutants into the lakes and streams… the sheer volume of water that
can’t soak into the ground and instead streams across concrete and asphalt and through
pipes can cause creeks to rise and rise quickly.


Andi Cooper is with Conservation Design Forum in Chicago. Her firm designs
landscapes to better handle water…


“Flooding is a big deal. It’s costly. That’s where we start talking about economics. We
spend billions and billions of dollars each year in flood damage control.”


Design firms such as Cooper’s are trying to get developers and city planners to think
about all that water that used to soak into the ground, filtering and being cleaned up a bit
by the natural processes.


Smart Growth America’s Don Chen says those natural processes are called infiltration….
and Smart Growth helps infiltration…


“And the primary way in which it does is to preserve open space to allow for natural
infiltration of water into the land so that there’s not as much pavement and hard surfaces
for water to bounce off of and then create polluted runoff.”


People such as Chen and Cooper are bumping up against a couple of centuries or more of
engineering tradition. Engineers and architects have almost always tried to get water
away from their creations as fast and as far as possible. Trying to slow down the water…
and giving it room to soak into the ground is a relatively new concept.


The U.S. Environmental Protection Agency is trying to get communities to give the idea
some consideration. Geoff Anderson is the Acting Chief of Staff for the EPA’s Office of
Policy, Economics and Innovation.


“Anything you can do to keep that water on site and have it act more like it does in its
natural setting, anything you can do to sort of keep that recharge mechanism working,
that’s helpful.”


The EPA does not require that kind of design. It leaves that to local governments and the
private sector. The Conservation Design Forum’s Andi Cooper says sometimes getting
companies to think about treating water as a resource instead of a nuisance is a hard
sell…


“You know, this is risky. People tell us this is risky. ‘I don’t want to do this; it’s not the
norm.’ It’s becoming less risky over time because there are more and more
demonstrations to point to and say ‘Look, this is great. It’s working.’ ”


But… corporate officials are hesitant. Why take a chance on something new? They fear
if something goes wrong the boss will be ticked off every time there’s a heavy rain.
Cooper says, though, it works… and… reminds them that investors like companies that
are not just economically savvy… but also have an environmental conscience.


“A lot of companies are game. They’re open. If we can present our case that yes, it
works; no, it’s not risky; it is the ethical thing to do; it is aesthetically pleasing; there are
studies out there that show you can retain your employees, you can increase their
productivity if you give them open spaces to walk with paths and make it an enjoyable
place to come to work everyday.”


So… doing the right thing for the environment… employees… and making investors
happy… make Wall Street risk takers willing to risk new engineering to help nature
handle some of the rain and get it back into the aquifers and springs that we all value.


For the GLRC… this is Lester Graham.

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RETHINKING WATER RUNOFF DESIGN (Short Version)

  • Rainwater that falls on paved areas is diverted into drains and gutters. If the rainfall is heavy enough, the diverted water can cause flash flooding in nearby rivers and streams. (Photo by Michele L.)

An Environmental Protection Agency official wants local governments to take a broader view when making land use plans for their communities. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

An Environmental Protection Agency official wants local governments to take a broader view
when making land use plans for their communities. The Great Lakes Radio Consortium’s Lester
Graham reports:


Often planners don’t look past their own city borders when making decisions. Geoff Anderson
wants that to change. He’s the Acting Chief of Staff for the EPA’s Office of Policy, Economics
and Innovation. Anderson says city officials often look at land use planning one site at a time
instead of looking at how their decisions will affect the entire area…


“The two scales are very important and I think in many cases too much is paid to the site level
and not enough is given to the sort of broader regional or community context.”


Anderson says that’s especially important when planning for stormwater drainage. He says too
many communities think about getting the water to the nearest stream quickly without thinking
about how that rushing water might affect flooding downstream.


For the GLRC, this is Lester Graham.

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Exploring a Great Lakes Salt Mine

  • Salt is an essential resource for all people, especially those who live in areas where the roads get icy. (Photo by Lucian Binder)

Ever wonder where road departments get the mountains of salt they use each winter? Here in the Midwest, the answer can be found deep under Lake Erie. The Great Lakes Radio Consortium’s Ann Murray has the
story:

Transcript

Ever wonder where road departments get the mountains of salt
they use each winter? Here in the Midwest, the
answer can be found deep under Lake Erie. The Great Lakes Radio
Consortium’s Ann Murray has the story:


Orvosh: “Step right in there.”


Murray: “Ok, thanks.”


For Don Orvosh, an elevator ride nearly 2000 feet underground is just part of the daily grind.


(sound of clanking)


“It’s about a four and a half minute ride to the bottom. 1800… about 1800 feet.”


Orvosh supervises the Cleveland salt mine owned by Cargill Corporation. It’s one of only eleven active salt mines in the country. The mine lies beneath the northern edge of Cleveland and extends about four miles under Lake Erie.


Orvosh: “Most people in the city don’t even realize there’s a mine right here.”


Murray: “Are you all the way down?”


Orvosh: “We’re at the bottom right now. This is it.”


(sound of opening air-lock door)


A few feet from the elevator, Orvosh walks through a series of air-locked metal doors. They rotate to reveal a subterranean repair shop. Massive dump trucks and cranes are fixed here. The cavernous room is also the starting point for hundreds of miles of tunnels. These tunnels connect a honeycomb of old and active areas in the mine. Everyday, 150 workers travel this salt encrusted labyrinth by truck or tram.


“We’re going to get in this little buggy here now and in a couple minutes we’ll be under the lake.”


Lake Erie is a geological newcomer compared to the salt buried below it. This bed – extending from upper New York to Michigan – was formed 410 million years ago. That’s when an ancient sea retreated and left behind its brine. Oil drillers accidentally discovered the deposit in the 1860’s. As Orvosh drives north through the dark passageways, he says salt wasn’t extracted here until many years later.


“This shaft was sunk in the late fifties and the actual mining of salt occurred, started in the early sixties so it’s been here 40 plus years.”


In the last four decades, the mining process has stayed pretty much the same. Orvosh compares it to the room and pillar method used in underground coal extraction. He points up ahead to a brightly lit chamber. Machine generated light bounces off the room’s briny, white walls. Its 20 foot high ceiling is bolstered by pillars of salt the size of double-wide trailers.


Orvosh: “This is an active production section. This is where we are mining salt.”


Murray: “What’s happening here?”


Orvosh: “He’s drilling the face here.”


A miner sits atop a machine with a large needle nosed drill. It bores six holes into the seam. Later in the day, workers will load explosives in the holes and blow out big chunks of salt. Farther into the mine, the loose salt from last night’s blasting is being scooped up by front-end loaders and dumped into a crusher. All of the big chunks are broken into small pieces. Then the salt is loaded on conveyor belts and sent to the mine’s three-story-high underground mill. Salt is crushed, sized, screened and sent to the surface by elevator.


All told, the crews at the Cleveland mine produce two million tons of salt a year. A sizable chunk of the 15 million tons of salt used on icy US roads each winter. Demand for road salt has skyrocketed since it was introduced as a de-icer in the early 1950s. But Robert Springer, a 27- year veteran at this operation, says each mine fights for a market share.


Springer: “It is a competitive market. There’s another salt mine just in the Cleveland area, out there in Morton, Morton Salt.”


Murray: “We needed you today. The roads were really icy. Do you look forward to icy days to keep production up?”


Springer: “I guess you could say we look forward to bad weather. We enjoy the bad weather because we know there’s going to be salt used.”


(sound of radio and weather report)


Back on the surface, Bob Springer has gotten his wish… Cleveland has just been hit with a winter storm. At least a dozen trucks swing through the mine’s loading dock to pick up tons of salt. Later in the day, salt will be dumped onto barges and transported across the Great Lakes to places like Chicago and Toronto. This is high season for road salt. The crews here know that come March, they’ll start rousing salt from its ancient bed for the winter of 2006.


For the Great Lakes Radio Consortium, this is Ann Murray.

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Living Entirely Off the Grid

  • Solar panels aren't just for rocket scientists anymore. Consumers are now starting to use solar and other alternative energies to power their homes. (Photo courtesy of NASA.gov)

With no power lines in sight, one western Pennsylvania couple lives pretty much like the rest of us. The Great Lakes Radio Consortium’s Ann Murray has this story of a home “off the grid”:

Transcript

With no power lines in sight, one western Pennsylvania couple lives pretty much like the rest of us. The Great Lakes Radio Consortium’s Ann Murray has this story of home “off the grid”:


Ted Carns is busy hanging art in the foyer of his house. While he holds a picture in place against the wall, he plugs in an electric drill.


(sound of drill)


Ted and Kathy Carns’ entire two-bedroom house uses electricity powered by the sun or wind. Their rustic stone and plank home sits on top of a steep wooded hill, miles from the nearest neighbor.


“There’s no water, there’s no soil, there’s no public utilities up here. So everything that we designed, you have to keep in mind, was done in this harsh condition.”


It’s taken the Carns twenty years to design and expand their alternative energy system. Ted, a self-described scrounger and handyman, has found many components through flea markets and friends. In fact, Kathy says their off-grid system began with a gift of shoebox-sized batteries.


Kathy: “Somebody gave us a bunch of batteries-nickel cadmium batteries. And then we started thinking about how to recharge the batteries. Thinking wind. The windmill came first.”


Ted: “It took me eight climbs to install the new windmill, I had a different one up there. The bottom of the tower I built.”


Murray: “How tall is that?”


Ted: “Seventy-six feet.”


(sound of chimes)


The metal tower now looms over the house, outbuildings and organic garden. As the wind whips the chimes at its base, the turbine blades whirl and drive an alternator to generate electricity. The electricity is stored in a bank of batteries.


Murray: “Is the wind consistent here?”


Carns: “Winter good. Summer not. Then in summer the solar panels kick in. So it just sort of balances out.”


The Carns’ rooftop solar panels accept sunlight into silicon chips and convert the light into electricity. Because it’s sunny today, Kathy can run their specially manufactured clothes washer with solar energy. First, she pushes a button on the living room wall and a red light starts to blink. The light indicates that stored electricity is being converted from a DC to AC current.


“That means the house is on 110 power. Turn the water on and then just… It’s on.”


The Carns also vacuum when the sun shines or the wind blows. They run their TV, stereo and lights off 12-volt DC batteries, much like a car. They heat their water with solar energy in the summer and wood in the winter. And warm their house with a wood stove. They also capture air from underground and use it to refrigerate food and cool their house. All told, Ted and Kathy have spent about 3,000 dollars to upgrade their alternative energy system. Ted says, except for burning wood, the system is nonpolluting. He believes it’s also pretty much hassle free.


Carns: “There’s no inconvenience that we’ve seen… There’s maybe two or three days that we don’t have ample hot water. The nice thing about that is that it – you never stop appreciating the conveniences because periodically for a very short time sometimes you have to do without.”


Perez: “More and more people are discovering that they can power their homes and small businesses using solar and wind.”


Richard Perez is the founder and publisher of Home Power Magazine. Perez says states are doing far more than the federal government to encourage the residential use of renewable energy.


“There are tax credits, there are rebates, there are buy-downs. Every state has a slightly different scheme but most states have some sort of financial incentive for installing small-scale renewables in your home.”


Perez says homeowners don’t have to wait wait for government support to set up a system. Ted and Kathy Carns agree.


(sound of plates and silverware)


As the couple gets ready for dinner, Kathy says they want to inspire the many people who come to see how they live off-grid.


“We have a friend who has a solar lawnmower now. We have friends in Philadelphia that took some solar panels; it’s not their total system, but it’s a little part of their system. If we get enough company and enough people have been here, it sort of branches out, and goes off.”


An estimated 180 thousand households in the United States generate some or all of their own electricity. But alternative energy systems aren’t for everybody. For people who are downright afraid of technology or inconvenience, life off the power grid isn’t a real option just yet.


For the Great Lakes Radio Consortium, I’m Ann Murray.

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Solution for Arsenic in Drinking Water?

  • Researchers from the University of Illinois have discovered a way to remove arsenic from drinking water at its source. (photo by David Guglielmo)

Researchers believe they have found a way to reduce
arsenic levels in drinking water. They say, for people to drink water from wells or aquifers, the solution starts at the source. The Great Lakes Radio Consortium’s Jeff Bossert explains:

Transcript

Researchers believe they have found a way to reduce arsenic levels in drinking water. They say, for people to drink water from wells or aquifers, the solution starts at the source. The Great Lakes Radio Consortium’s Jeff Bossert explains:


Chronic exposure to arsenic in drinking water has been linked to a variety of health concerns, including hypertension, cardiovascular disease, and cancer.


Researchers from the University of Illinois collected groundwater samples from 21 wells. They found that the wells with almost no arsenic in the water also contained high levels of sulphate-reducing bacteria, which convert the arsenic into a solid, where it drops out of the water. Dr. Craig Bethke led the study.


“What we’re saying is that if there’s sulfate in the water, then there’s probably sulfate-reducing bacteria active in the subsurface, and that means that a simple field test, which is very inexpensive and very rapid to protect sulfate, could identify safe water sources.”


Bethke says places where aresenic levels are high, sulphate salts, such as gypsum and calcium sulphate, can be injected underground to reduce arsenic levels.


Researchers say this information could prove to be invaluable in places where aresenic contamination is a major problem, including parts of the U.S., Australia, and Mongolia. The researchers’ findings were published in the journal Geology.


For the Great Lakes Radio Consortium, I’m Jeff Bossert.

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Breaking Down Groundwater Pollution

  • While the idea of cleaning up the water with bacteria may be oxymoronic, Michigan State University is saying that it works. (Photo courtesy of the National Science Foundation)

Scientists in the Great Lakes region are seeing good results from a new method that fights groundwater pollution. The Great Lakes Radio Consortium’s Erin Toner has more:

Transcript

Scientists in the Great Lakes region are seeing good results from a new method that fights groundwater pollution. The Great Lakes Radio Consortium’s Erin Toner has more:


Researchers at Michigan State University are using a process that introduces microbial bacteria into contaminated aquifers. Over time, the microbes break down hazardous waste, usually from industrial spills. Before this new technology, the most common cleanup technique was called “air stripping.” That requires groundwater to be pumped to the surface, where toxic chemicals are basically blown out of the water and into the air.


Professor Mike Dybas says the new process doesn’t leave pollution in the ecosystem.


“It’s treatment actually occurring where the pollution is, and it is physically destructive of the contaminant. So at the end of the day, the contaminants are broken down into harmless end products.”


Dybas says the process could be used in any type of industrial or agricultural spill. He says since the microbes move with the water, cleanup could stretch for miles underground.


For the Great Lakes Radio Consortium, I’m Erin Toner.

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