Tag: pollutants

The Debate Over a Corn-Based Hydrogen Economy

  • Researchers are looking at ethanol from corn as an environmentally-friendly way to power fuel cells. However, some studies show corn-based ethanol takes more energy to produce than the fuel provides. (Photo by Lester Graham)

Researchers are looking at ways to use corn-based ethanol as a way to power hydrogen fuel cells. It would appear to be an environmentally friendly way to get into the hydrogen fuel economy. However, ethanol might not be as environmentally friendly as its proponents claim. Backed by the farm lobby and ag industries such as Archer Daniels Midland, ethanol has plenty of political support. But some researchers say corn-based ethanol is a boondoggle. The Great Lakes Radio Consortium’s Mary Stucky reports:

Transcript

Researchers are looking at ways to use corn-based ethanol as a way to power hydrogen fuel cells.
It would appear to be an environmentally friendly way to get into the hydrogen fuel economy.
However, ethanol might not be as environmentally friendly as its proponents claim. Back by the
farm lobby and ag industry such as Archer Daniels Midland, ethanol has plenty of political
support. But some researchers say corn-based ethanol is a boondoggle. The Great Lakes Radio
Consortium’s Mary Stucky reports…


This reactor is in a laboratory at the University of Minnesota ticking as it converts ethanol into
hydrogen. Researchers here envision thousands of these inexpensive reactors in communities
across America using ethanol to create hydrogen, which would then be used in fuel cells to
generate electricity.


Lanny Schmidt, a Professor of Chemical Engineering, directs the team that created the reactor.


“We’re not claiming our process is the cure-all for the energy crisis or anything like that. But it’s
a potential step along the way. It makes a suggestion of a possible way to go.”


Hydrogen is usually extracted from fossil fuels in dirtier and more costly refineries.


Schmidt says it’s much better to make hydrogen from ethanol.


“It right now looks like probably the most promising liquid non-toxic energy carrier we can think
of if you want renewable fuels.”


Not so fast, says David Pimentel, an agricultural scientist at Cornell University. For years,
Pimentel has warned about what he calls the cost and efficiency and boondoggle of ethanol.
Pimentel says ethanol is a losing proposition.


“It takes 30-percent more energy, including oil and natural gas, primary those two resources to
produce ethanol. That means importing both oil and natural gas because we do not have a
sufficient amount of either one.”


Pimentel says most research on ethanol fails to account for all the energy needed to make the fuel,
such as energy used to make the tractors and irrigate crops. Adding insult to injury, says
Pimentel, ethanol relies on huge government subsidies going to farmers and agri-business.


“If ethanol is such a great fuel source, why are we subsidizing it with 2-billion dollars annually?
There’s big money, as you well know, and there’s politics involved. And the big money is leaking
some of that 2-billion dollars in subsidies to the politicians and good science, sound science,
cannot compete with big money and politics.”


Pimentel also points to environmental damage of growing corn – soil erosion, water pollution
from nitrogen fertilizer and air pollution associated with facilities that make ethanol. But
Pimentel has his detractors.


David Morris runs the Institute for Local Self Reliance in Minneapolis. Morris is not a scientist,
but he commissioned a study on ethanol. He says Pimentel relies on out-of-date figures and fails
to account for the fact that ethanol production is getting more efficient.


Morris’ findings – a gallon of ethanol contains more than twice the energy needed to produce it.
As for subsidies…


“There’s no doubt that if we did not provide a subsidy for ethanol it would not be competitive
with gasoline. But what we need to understand is that we also subsidize gasoline, and if you took
the percentage of the Pentagon budget, which is spent directly on maintaining access to Middle-
Eastern oil, and impose that at the pump, it would add 25- to 50-cents a gallon. At that point,
ethanol is competitive, under the assumption that you will not need a large military budget to
protect our access to Iowa corn.”


But more efficient than making ethanol from corn might be grass, or even weeds. David Morris
says that’s because you don’t have fertilize or irrigate those kinds of plants, the way you do corn.


“So if we’re talking about ethanol as a primary fuel to truly displace gasoline, we have to talk
about a more abundant feedstock. So instead of the corn kernel, it become the corn stock, or it
becomes fast-growing grasses, or it becomes trees, or sawdust or organic garbage. And then
you’re really talking about a carbohydrate economy.”


Pimentel scoffs at that idea.


“You’ve got the grind that material up, and then to release the sugars, you’ve got to use an acid,
and the yield is not as high. In fact, it would be 60-percent more energy using wood or grass
materials.”


While scientists and policy people debate whether ethanol is efficient or not, Lanny Schmidt and
his team soldier on in the lab undeterred in their efforts to use ethanol for fuel. Schmidt
understands some of Pimentels’s concerns, but he thinks scientists will find an answer, so ethanol
can be used efficiency enough to help power the new hydrogen economy.


For the Great Lakes Radio Consortium, I’m Mary Stucky in Minneapolis, Minnesota.

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Putting the Brakes on Lead Wheel Weights

  • When tires are balanced, lead weights are usually attached to the wheel rim. The weights make sure the tires wear evenly, and ensure a smooth ride. But the Ecology Center says the weights fall off, and the lead degrades easily, posing a risk to human health. (Photo by Mark Brush)

Lead is toxic to children. Even small amounts of exposure can cause developmental problems. Lead-based house paint is banned in the U.S. Now, an environmental group is calling for a phase-out of a car part that contains lead. The Great Lakes Radio Consortium’s Rebecca Williams has more:

Transcript

Lead is toxic to children. Even small amounts of exposure can cause developmental problems.
Lead-based house paint is banned in the U.S. Now, an environmental group is calling for a
phase-out of a car part that contains lead. The Great Lakes Radio Consortium’s Rebecca
Williams has more:


(tire balancing sound)


When you go to get new tires, or to have them rebalanced, the mechanic often
attaches lead weights to the wheel rims. The weights help ensure a smooth
ride and make sure tires wear evenly.


But two recent studies found some of these wheel weights fall off. The
researchers say that adds up to 275 tons of lead dropped onto roads in the
region every year. One of the studies found the soft metal gets ground up
and deposited near curbs.


Jeff Gearhart is with the Ecology Center. His group is concerned the lead
dust could be tracked into homes and washed into water supplies. So the
group is working with tire retailers to switch to non-lead wheel weights.


“Lead, in commerce, being used in a way where there’s exposure, is something
we should move away from. The European Union has banned the use of these
weights and we think that that is going to be needed in the U.S. as well.


Gearhart says the Ecology Center will help retailers cover the cost of
switching to non-lead weights.


For the Great Lakes Radio Consortium, I’m Rebecca Williams.

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Epa Tightens Rules on Slaughterhouse Waste

It takes a lot of work to turn a cow or chicken into a hamburger or chicken nuggets. And the process creates a lot of waste. Now, the Environmental Protection Agency is aiming to reduce the pollution that’s released into rivers, lakes and streams. The Great Lakes Radio Consortium’s Rebecca Williams has more:

Transcript

It takes a lot of work to turn a cow or chicken into a hamburger or chicken nuggets. And the
process creates a lot of waste. Now, the Environmental Protection Agency is aiming to reduce
the pollution that’s released into rivers, lakes and streams. The Great Lakes Radio Consortium’s
Rebecca Williams has more:


The EPA estimates meat and poultry processors use 150 billion gallons of water every year.
Most of that water becomes wastewater. That wastewater can contain oil, blood, manure, and
feathers.


If the wastewater isn’t treated, organic wastes and nutrients are released directly into waterways.
Excess nutrients can cause harmful algae blooms, and kill fish.


The new rule targets about 170 meat and poultry processors.


Mary Smith directs a division of the EPA’s Office of Water.


“The meats industry will have to meet tighter limits on the pollutants that it discharges to the
water. And then, of course, for poultry, this is the first time they will be regulated at all, they
didn’t have preexisting regulations, unlike the meats industry. And they will have to meet limits
for ammonia, total nitrogen, and what we call conventional pollutants.”


These regulations are a result of a lawsuit against the EPA, settled 13
years ago.


For the Great Lakes Radio Consortium, I’m Rebecca Williams.

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Old Chlorine Plants Lose Track of Mercury

The Environmental Protection Agency is accused of ignoring the disappearance each year of tons of mercury at several processing plants. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

The Environmental Protection agency is accused of ignoring the disappearance each year of tons
of mercury at several processing plants. The Great Lakes Radio Consortium’s Lester Graham
reports:


The plants make chlorine. Part of the process at these older plants involves putting an electric
current through big vats of mercury. Every year the plants buy tons more mercury, but don’t
report that it escapes as emissions. Three environmental groups have sued the EPA, saying the
agency isn’t protecting the public’s health when it allows that much mercury to just disappear.


Jim Pew is a lawyer with one of the groups, Earthjustice.


“The very simple question that came up is, ‘Gosh, where is all this mercury going?'”


“And nobody seems to be able to answer that?”


“No. The Environmental Protection Agency gave it a little bit of thought and then declared that –
and this is a quote, “…somewhat of an enigma.”


Mercury can cause neurological damage to humans. Fetuses and young children are especially at
risk. The environmental organizations want the EPA to find out what happens to all that mercury
and require the older plants to modernize to a process that doesn’t need mercury to make
chlorine.


For the Great Lakes Radio Consortium, this is Lester Graham.

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Study: Vinyl Alternatives Just as Affordable

The production of vinyl products is considered by many to be an environmental hazard. But vinyl’s affordability keeps it popular. Now a new study says vinyl alternatives can be just as affordable. The Great Lakes Radio Consortium’s Corbin Sullivan reports:

Transcript

The production of vinyl products is considered by many to be an environmental hazard. But
vinyl’s affordability keeps it popular. Now a new study says vinyl alternatives can be just as
affordable. The Great Lakes Radio Consortium’s Corbin Sullivan reports:


Vinyl or PVC is used in everything from pipe fittings to
medical gloves. It’s cheap and easy to make.


But when vinyl is produced it releases hazardous substances like mercury and dioxin. Both are
known to threaten human health.


The study was done at Tufts University. The authors say
regardless of health threats, vinyl is only inexpensive in
the short term.


They say that while vinyl is cheap when you first buy it,
it doesn’t last as long as most of its alternatives.


Frank Ackerman co-authored the study. He says since
the study showed vinyl isn’t more affordable, using
vinyl is irresponsible to the environment.


“The excuse that the market made us do it, that we were
economically forced to do something that we knew was
bad for health and the environment. That’s a lousy
excuse. There’s no reason to put up with that. You can
afford to do what you know is right for your health and
for the environment of those around you.”


Ackerman says the alternatives can be materials that
vinyl originally replaced. These are often natural
materials like woods and metals.


For the Great Lakes Radio Consortium, I’m Corbin
Sullivan.

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Multi-State Effort Targets Mercury Pollution

A group of state legislators from the region are pushing for new laws aimed at limiting mercury pollution. The Great Lakes Radio Consortium’s Sarah Hulett reports:

Transcript

A group of state legislators from the region are pushing for new laws aimed at limiting mercury
pollution. The Great Lakes Radio Consortium’s Sarah Hulett reports.

The multi-state effort targets coal-fired power plants, and products that contain mercury – including
thermometers.

Wisconsin and Ohio are looking to enact stricter pollution controls on power plants than what’s
being proposed in Washington. Other states, including Michigan, are calling for a phase-out of
products that contain mercury. They also want mercury parts and switches to be removed from
cars and appliances before they’re scrapped.

Former Maryland lawmaker Leon Billings is with the National Caucus of Environmental Legislators:

“You’ve got to go at it from all perspectives. Power plants represent 30 to 40 percent of the
ambient mercury. But these other sources are significant, especially if they’re not controlled
properly.”

Mercury is a toxin that can affect the nervous system. It can be especially harmful to developing
children.

For the Great Lakes Radio Consortium, I’m Sarah Hulett.

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Epa Examines Midwest Insulation Processing Plants

The EPA is investigating more than two dozen insulation plants around the country that processed a dangerous form of ore called vermiculite. Five of the plants are in the Midwest. The Great Lakes Radio Consortium’s Tracy Samilton reports:

Transcript

The EPA is investigating over two dozen insulation plants around
the country that processed a dangerous form of ore called vermiculite.
Five of the plants are in the Midwest. The Great Lakes Radio Consortium’s
Tracy Samilton reports:


The processing plants converted an ore called vermiculite into insulation,
which was then shipped to millions of homes in cold areas of the country.
The vermiculite was laced with mineral fibers that can cause asbestosis and
lung cancer. The government is investigating if plant workers and people
who lived near the plants are at risk of becoming ill from exposure.
Early results from a plant in Illinois found that workers were at higher
risk, but not nearby residents.


Dr. Michael Harbut is an expert in occupational medicine. He says the investigation is long
overdue.


“This is a serious enough danger that the EPA is actually in the process of removing vermiculite
from some attics in some areas the country.”


Some of the processing plants have been shut down, but others have been
converted to other uses. The government plans to make sure those plants
are safe, and locate former workers to assess their health.


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

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Study: Mtbe Alternatives Pose Similar Threat

The Clean Air Act says gasoline must contain additives to help it burn more cleanly. But the common additive MTBE is a proven environmental threat. And a new study says the alternatives could be just as dangerous. The Great Lakes Radio Consortium’s Corbin Sullivan reports:

Transcript

The Clean Air Act says gasoline must contain additives to help it burn more cleanly. But the
common additive MTBE is a proven environmental threat. And a new study says the alternatives
could be just as dangerous. The Great Lakes Radio Consortium’s Corbin Sullivan reports:


Underground storage tanks at gas stations can leak. Fuel
additives like MTBE leak faster than the gas and can
cause groundwater pollution.


For that reason, seventeen states, including New York,
Michigan and Illinois have restricted or will restrict the use
of MTBE in gasoline.


That means other fuel additives intended to reduce air
pollution will have to be used instead.


Mel Suffet co-authored a new study published in the
journal Environmental Science and Technology.


He says some of the alternatives to MTBE can cause the
same problems.


They can be toxic and can make groundwater
undrinkable. Suffet says to solve the problem, leaks need
to be prevented.


“The first thing you have to do is develop a design of
underground fuel storage tanks to emphasize containment
leak detection and repair.”


Suffet says even modern tanks are prone to leaks. So he
says designers need to go back to the drawing board to
create a leak free tank.


For the Great Lakes Radio Consortium, I’m Corbin
Sullivan.

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Administration Changes Mercury Rules

The new chief of the U.S. Environmental Protection Agency is introducing rules for reducing mercury emissions from coal-burning power plants. But environmentalists and others say the rules actually rollback provisions in the Clean Air Act. The Great Lakes Radio Consortium’s Julie Grant reports:

Transcript

The new chief of the U.S. Environmental Protection Agency is introducing rules for reducing
mercury emissions from coal-burning power plants. But environmentalists and others say the
rules actually rollback provisions in the Clean Air Act. The Great Lakes Radio Consortium’s
Julie Grant reports:


Mercury is toxic. It can cause brain damage, especially in young children and fetuses. Forty-
percent of the mercury in air pollution comes from power plants, but it’s never been regulated as
a pollutant. The EPA had planned reductions of 90-percent by 2007. But now, the Bush
administration plans reductions of only 70-percent by 2018.


EPA Administrator Mike Leavitt praises the plan as good for the environment and the economy.
Environmentalists and others say it’s a complete deception. To implement the new program, they
say the administration has downgraded mercury from the “hazardous pollutant” category. Leavitt
denies that:


“We are not changing the status of mercury at all. It is a dangerous toxin and our objective is to
reduce it in the most aggressive way we possibly can.”


The new rules regulating mercury go into effect next December. For the Great Lakes Radio
Consortium, I’m Julie Grant.

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Parents Campaign for Cleaner School Buses

  • School buses might be considered one of the safest ways for kids to get to school, but research suggests the sooty diesel exhaust is also putting their health at risk. The Environmental Protection Agency is trying several demonstration projects to clean up school buses in some schools nationwide. Parents are also becoming part of a nationwide campaign to get buses to stop idling. (Photo by Erika Johnson)

In the last few years, researchers have discovered links between the exhaust fumes from diesel buses and rising asthma rates in children. Scientists and environmentalists have called on the government to crack down on diesel emissions from school buses. But as parents learn about the risk to their kids, they’re not waiting around for the government. They’re doing something right now to help reduce their kids’ exposure to the exhaust fumes. The Great Lakes Radio Consortium’s Erika Johnson reports:

Transcript

In the last few years, researchers have discovered links between the exhaust fumes from diesel
buses and rising asthma rates in children. Scientists and environmentalists have called on the
government to crack down on diesel emissions from school buses. But as parents learn about the
risk to their kids, they’re not waiting around for the government. They’re doing something right
now to help reduce their kids’ exposure to the exhaust fumes. The Great Lakes Radio
Consortium’s Erika Johnson reports:


(sound of diesel school buses idling)


At the end of the school day, buses sit, often idling their engines, waiting for the dismissal bell
and the kids to get on. Not every school district uses diesel school buses, but many do.
And when their engines are left running, they constantly spew out a sooty diesel exhaust that’s
hard to avoid.


(sound of kids)


“It’s an unnatural smell, kind of like plastic…”
“Smells like a car…”
“…Plastic and gas.”
“It smells like gasoline…”
“…But it stinks…”


Kids don’t like the smell of the exhaust, and parents are finding that the diesel fumes are doing
more than just creating a nasty stench – it’s putting their kids’ health at risk.


Sally Cole-Misch says for a long time, she never thought much about it. The yellow buses were
just a part of the daily routine:


“Well, you know, you never think that when you take your child and put them on the bus and
wave goodbye, you think, oh, they’re safe, no problem. And I started noticing the buses at the
schools, how they did idle, and started thinking, this is important, this is something really we need
to be focusing on.”


Cole-Misch was concerned about her kid’s exposure to the exhaust fumes. But rather than simply
taking her kids off the school bus, she decided she wanted to do something for all of the children
in her community. So, she and other concerned parents began meeting with a local
environmental group. They came to the conclusion that the best way to get rid of the diesel
fumes was for bus drivers to turn off their engines while waiting for the kids. As part of their
anti-idling campaign, they’re pushing their school district in Bloomfield, Michigan, to have bus
engines turned off until the buses are loaded up and ready to leave for their routes. During cold
weather, bus drivers can keep warm inside the schools, and then heat up the buses as soon as the
kids get on.


Cole-Misch says as parents learn about the issue, they’re getting involved in the anti-idling
campaign:


“I think this is the type of issue that the solution is so easy, in that in most school districts all you
have to do is give the parents the information, and I think it’s something that they can easily act
on.”

And the Eastern Michigan Environmental Action Counsel, also known as EMEAC, is doing just
that. The group is providing information to parents and is promoting the idea to local school
board officials.


Libby Harris is Staff Attorney for EMEAC. She says getting the parents involved has made their
campaign successful:


“Without the parents there, the school officials are going to respond that it’s a good idea, but they
are faced with a tremendous number of requests for programs. Having the parents there is a
direct statement. ‘This is a health issue, I’m concerned about it, and I really want you to take this
seriously and to take steps.'”


Concern over the health effects of diesel exhaust stems from the rising asthma rates reported
among children. The Centers for Disease Control estimate that nearly 5 million children
nationwide have the disease. Although no one knows exactly what causes asthma, scientists say
many of its triggers are found in the air we breathe. Recent air toxics studies have shown that
particulate matter, the soot released from diesel trucks and buses, is a leading air pollutant.


Dr. Thomas Robbins is a Professor at the University of Michigan’s School of Public Health:


“It is quite possible that a substantial fraction of the total diesel exposure, even total particulate
exposure, a child is going to experience during the day could be associated with school buses, and
so it’s potentially quite an important problem.”


And the government is also doing something about this growing public health problem, and has
tried several demonstration projects. EPA’s Clean School Bus U.S.A. Program is supporting
sixteen school districts nationwide with a small grant to participate in projects, such as using
cleaner diesel fuels, and retrofitting school buses with pollution control devices. The ultimate
goal is that these projects will become models for states to follow:


Jeff Holmstead is head of EPA’s National Air Pollution Control Program. Holmstead says all
diesel engines are to be replaced or retrofitted by the year 2010. But he says even with the stricter
standards, it’ll take some time to replace the older buses with cleaner ones:


“One of the reasons for this program is because diesel engines have such a long lifetime, it will
take many years, probably out to 2020 and 2030 for the newer engines to replace the existing
fleet. And that will take a little time and we’re just trying to expedite that process, and make it
happen as quickly as we can.”


But the problem now is that there isn’t enough funding to support programs like this in schools
nationwide. That’s why many schools and environmental groups, such as EMEAC, have turned
to anti-idling campaigns. They’re working with what they do have – and that’s the support of
their local community – until they have the funding for larger scale programs. Anti-idling
campaigns are becoming a growing trend in schools nationwide, and some states such as
Minnesota and Connecticut already have anti-idling laws in place.


Libby Harris of EMEAC says the energy behind their campaign starts with the local community:


“Once EPA announced its Clean School Bus U.S.A. Program, we saw that the momentum was
there, that by working with other organizations and inviting parents and members of PTO’s and
school officials, we had a good chance of making a difference and reducing the exposure that kids
have to school bus exhaust. And to reduce the amount of idling is something that can be done
without any cost.”


Not only realizing that school bus diesel exhaust is putting their kids health at risk, but that they
can do something even without any funding at all, more parents such as Cole-Misch have decided
not to wait around for diesel engine phase-outs or government programs. Instead, they’re pushing
their school districts to start doing something right now about the diesel fumes their kids are
breathing. And they feel progress starts when the buses are turned off.


For the Great Lakes Radio Consortium, I’m Erika Johnson.

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