Tag: filling

New Fuel Economy Standards

  • Right now, cars get an average 27 and a half miles per gallon. By 2011, they'll have to get 30.2 (Photo by Ben VonWaggoner)

The U.S. Environmental Protection Agency issued new vehicle fuel economy standards for cars and trucks. As Tracy Samilton reports, it’s the first change since 1985:

Transcript

The U.S. Environmental Protection Agency issued new vehicle fuel economy standards for cars and trucks. As Tracy Samilton reports, it’s the first change since 1985:

Right now, cars get an average 27 and a half miles per gallon. By
2011, they’ll have to get 30.2. Light trucks, including SUVs, will
have to get 24.1 miles per gallon, up a mile per gallon.

Eli Hopson
is with the Union of Concerned Scientists. He says the change is not
dramatic but it’s still an important milestone.

“The car standards haven’t
changed. They’ve been at 27.5 for over twenty years. It is a big deal. It’s
been a long time in coming.”

Carmakers are prepared for the new standard and say they’ll meet it.
Future standards will be tougher.

Auto companies usually complain
when mileage standards are raised. But times have changed, especially
for Chrysler and GM. They might not be as vocal since accepting
billions in federal loans.

For The Environment Report, I’m Tracy
Samilton.

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Fuel Expansion Pinches Pennies at the Pump

  • You get more out of your tank of gas if it is purchased in a cold location versus a warm one (Photo by Ben VonWaggoner)

People who buy gasoline in cold
places get more bang for their buck than
people buying gas in warm places. Kyle
Norris explains:

Transcript

People who buy gasoline in cold
places get more bang for their buck than
people buying gas in warm places. Kyle
Norris explains:

Let’s say my friend Ana buys 10 gallons of gasoline in a cold place like the
Canadian tundra. And I buy 10 gallons of gas in the warm state of Florida.
My friend Ana will be able to drive further than I will with those 10 gallons.

That’s because gas expands at warm temperatures. But its energy content
does not.

There’s a gizmo gas stations can put on individual pumps that adjusts for
temperature differences. But each one costs a couple thousand bucks a pop.

Dave Maurer is with the US Government Accountability Office.

“There actually have not been a lot of studies done on the benefits and costs of installing this
equipment. Really what we found is that it’s not really known.”

Right now different states do different things. California has just started a
major study on this topic. But without much research, Maurer said it’s tough
for policy makers to make decisions.

For The Environment Report, I’m Kyle Norris.

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Mercury in Your Pearly Whites

  • George Washington's dentures (Photo courtesy of the National Institute of Dental and Craniofacial Research)

Some consumer advocate groups say there’s
another reason to fear a trip to the dentist. They
say dentists should stop using mercury to make some
types of metal fillings. Mark Brush reports the
groups recently settled a lawsuit with the Food and
Drug Administration:

Transcript

Some consumer advocate groups say there’s
another reason to fear a trip to the dentist. They
say dentists should stop using mercury to make some
types of metal fillings. Mark Brush reports the
groups recently settled a lawsuit with the Food and
Drug Administration:

Moms Against Mercury and several other groups sued the FDA. They said the agency
was failing to inform the public about the dangers of mercury in dental fillings.

Mercury can do damage to the nervous system. But people’s exposure from fillings has
long been debated.

Charlie Brown is a lawyer for the groups who sued the FDA. He says getting mercury
out of dental offices will protect those most at risk.

“It’s permanent damage to the developing brain. Not like a guy like me losing brain cells
everyday, but to the child whose potential is being destroyed by neuro-toxic damage.”

As a result of the lawsuit, the FDA changed its message about mercury exposure from
dental fillings. They now say the exposure might hurt the nervous systems in developing
children and fetuses.

The agency plans take a closer look at the science and issue a final rule next year.

For The Environment Report, I’m Mark Brush.

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Dental Offices Adding to Mercury Problem

  • George Washington's dentures. (Photo courtesy of the National Institute of Dental and Craniofacial Research)

Dental offices are producing higher levels than
expected of a toxic form of mercury. Rebecca Williams
reports on the findings of a new study:

Transcript

Dental offices are producing higher levels than
expected of a toxic form of mercury. Rebecca Williams
reports on the findings of a new study:

When dentists remove fillings, most of the mercury in the fillings is
trapped in a filter in the spit drains. But some of it does get through.

Mercury in its simplest form is not as toxic as what’s called methyl
mercury. That forms when mercury is exposed to certain bacteria. Methyl
mercury is very toxic even in small amounts.

Researchers at the University of Illinois say they found much higher levels
of methyl mercury in wastewater from dental offices than they expected. In
fact – they say they were the highest levels of methyl mercury ever reported
in an environmental water sample. And that toxic mercury is eventually
released into the environment.

The findings were published online in the journal Environmental Science and
Technology.

To put this all in perspective – the authors say the amount of mercury
coming from dental offices is really, really tiny compared to mercury coming
from coal-fired power plants.

For the Environment Report, I’m Rebecca Williams.

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