Color Changing Bacteria Detector

  • A team at Tufts University is working on sensors that could change color to tell you if a bag of lettuce has dangerous bacteria in it. (Photo by Ken Hammond, courtesy of the USDA)

Researchers are working on a tool
that could tell you if your food is safe
to eat before you break open the bag.
Rebecca Williams has more:

Transcript

Researchers are working on a tool
that could tell you if your food is safe
to eat before you break open the bag.
Rebecca Williams has more:

A team at Tufts University is working on sensors that could change color to
tell you if a bag of lettuce has dangerous bacteria in it.

The special ingredient is silk. They boiled silkworm cocoons. And made a
thin silk film out of the proteins. The silk film has color changing properties
– like a butterfly’s wing.

Fio Omenetto is the lead researcher. He says it could be possible to activate
the film so it detects the presence of E. coli. Then the film could be put in a
bag of spinach.

“So immediately by looking at color change you will be able to tell whether
the spinach is good to eat or not.”

Omenetto says this is still pretty futuristic at this point. He says it’ll
probably be at least five years before you might see this at the grocery store.

For The Environment Report, I’m Rebecca Williams.

Related Links

Great Lakes Call for Help

  • Some feel the Great Lakes are being ignored by Congress (Photo courtesy of Great Lakes Environmental Research Laboratory, NOAA)

The Great Lakes might be the most ignored
resource on the continent. Great Lakes advocates
say they have not been able to get enough attention
or money from Congress. Rebecca Williams reports
one group is outlining what needs to be done to fix
the Lakes before climate change makes things worse:

Transcript

The Great Lakes might be the most ignored
resource on the continent. Great Lakes advocates
say they have not been able to get enough attention
or money from Congress. Rebecca Williams reports
one group is outlining what needs to be done to fix
the Lakes before climate change makes things worse:

Washington D.C. is a long way from the Great Lakes. Most members of
Congress don’t live near the lakes. And many don’t understand just how big
they are.

Don Scavia used to work for the National Oceanic and Atmospheric
Administration in Washington.

“I’ve spent 15 years inside the Beltway and I just know that the Great Lakes just don’t
have the same sense of urgency and importance inside the Beltway as some other places like the Chesapeake Bay and others have. Senators and
Congressmen don’t have boats on it like they do on the Chesapeake. I think
it’s a matter of if you haven’t been here, if you haven’t seen them, you
really don’t get it.”

These days, Don Scavia is a scientist at the University of Michigan. He’s a
co-author of a report on global warming and the Great Lakes. He says we
need to help the Great Lakes adapt to the changes that are already happening
because of global warming.

“The restoration strategy is put in place specifically to increase the
resiliency of the Lakes, increase the buffering capacity of the Lakes, to allow them
to adapt to this near-term climate change.”

Just about everyone around the Great Lakes has noticed that water levels are
dropping. Recreational boats can get stuck. Big cargo ships can’t get into
harbors. And they have to carry lighter loads when lake levels drop. That
means more trips, and, eventually, higher prices for all of us. And
climate change might make it worse.

On top of that, the Great Lakes are struggling with fisheries collapsing,
invasive species damaging the ecosystem, and pollution that’s never been
cleaned up.

Jeff Skelding is with the Healing Our Waters-Great Lakes Coalition.

“When Great Lakes effort began, we had a lot on our plate to deal with and
then we looked at the science of global warming and its impacts on the Great
Lakes it kinda froze us in our tracks. Now we’ve got global warming to
contend with.”

So, what do the advocates want from Congress?

There’s a $20-billion price tag on Great Lakes restoration.

Bits and pieces of it have gone before Congress. And there’s been some
progress on money for things like restoring wetlands. But for the most
part, most of the time, the Great Lakes just haven’t been a priority in
Washington.

Rahm Emanuel is a Congressman from Illinois. He holds a leadership position
among the House Democrats. He says he hopes the money will be approved by
Congress sometime soon.

“I don’t want another study, I don’t want to pay for another analysis, I’m
over studied, over analysis-ed. We know what it takes to fix it, we know
what the pollutants are, now we’ve got to put our money where our mouth is.”

Politically, the time might not get any better for Great Lakes advocates.
There’s a Census coming up and new Congressional district lines will be
drawn. The Great Lakes region will lose representation in the US House.
That means the Great Lakes states will lose clout in Congress.

So, the region’s members of Congress need to get a Great Lakes restoration
package to the next President before that happens. Great Lakes advocates
are hoping the next President – whether it’s McCain, Obama or Clinton – will
give the Great Lakes more attention, and money.

For The Environment Report, I’m Rebecca Williams.

Related Links

Today’s Signs of Warming Planet

  • The classic photograph of the Earth, taken by the Apollo 17 crew on December 7, 1972 traveling toward the moon (Photo courtesy of NASA-JSC Gateway to Astronaut Photography of Earth)

Climate change is already affecting crops,
forests, water and wildlife. That’s according to
a new government report. Lester Graham reports:

Transcript

Climate change is already affecting crops,
forests, water and wildlife. That’s according to
a new government report. Lester Graham reports:

Climate change is not something that’s coming. It’s here, according to a report from the
U.S. Climate Change Science Program.

Peter Backlund is one of the chief authors of the new report.

“What was really striking was just how many different changes have been documented
and how much is changing more rapidly than we would have expected ten or fifteen
years ago. And we’re seeing widespread impacts sooner than we expected.”

The report basically says for every good thing climate change brings, there’s something
bad.

Faster growing crops, but more crop failures. Warmer winters mean livestock
survive better, but then hotter summers will be harder on the animals. And there are already
more forest fires and more insects killing trees.

For The Environment Report, this is Lester Graham.

Related Links

Roadblocks for Water Diversion Agreement?

  • The Annex 2001 Agreement discusses how much and to whom the water from the Great Lakes is going. Ontario objects to the current Agreement in fear that it doesn't do enough to protect the Lakes. (Photo by Kym Parry)

Ontario provincial leaders say they’re not willing to sign
a draft agreement aimed at protecting the Great Lakes from diversion in its current form. As the Great Lakes Radio Consortium’s Sarah Hulett reports, observers say Ontario’s objections won’t sidetrack negotiations on the agreement known as the Great Lakes Charter
Annex:

Transcript

Ontario provincial leaders say they’re not willing to sign a draft agreement aimed at protecting the Lakes from water diversions in its current form. Observeers say the objections won’t sidetrack negotiations on the agreement known as the Great Lakes Charter Annex. The Great Lakes Radio Consortium’s Sarah Hulett has this report:


The Charter Annex would give the eight states and two provinces that surround the Lakes a say in how much water can be diverted out of the Lakes to other regions. But Ontario officials say they don’t think the current draft goes far enough to protect the Lakes. David Natzger is with the Council of Great Lakes Governors, which is coordinating negotiations bewteent he states and provinces to implement the Annex. Natzger says the announcement reflects healthy debate, and not a snag in the process.


“I think it says that there’s a lot of interest in this issue in Ontario, and certainly there were some concerns that were raised in the public comment period, and they will be taken into consideration as changes are considered and made, ultimately.”


In January, the staffs of the Great Lakes governors and premiers plan to start negotiating changes to the Annex. Natzger says the changes will reflect some of the concerns brought forward in ten-thousand public comments.


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

Related Links

Odd Animal Behavior a Sign of Toxic Pollution

  • Odd animal behaviors have been noted in some birds, fish, and frogs. Researcher Ethan Clotfelter believes it may have something to do with exposure to toxic chemicals. (Photo by Sean Okihiro)

Toxic chemicals can sometimes be fatal to wildlife. Some researchers are now looking for more subtle signs of contamination. The Great Lakes Radio Consortium’s Mark Brush explains:

Transcript

Toxic chemicals can sometimes be fatal to wildlife. Some researchers are
now looking for more subtle signs of contamination. The Great Lakes Radio
Consortium’s Mark Brush explains:


Researchers are looking for birds that have a hard time standing up
straight, fish that are unusually aggressive, or frogs that seem a little
confused. These are signs that the animals might be affected by low-level toxic
contamination.


Ethan Clodfelter is a researcher at Amherst College. He studied data that looked at the behaviors of animals from all over the world. He says toxic chemicals that persist in the environment might explain why these animals are behaving oddly.


“What we really are trying to do is to come up with behavioral measures that
are good, sort of, early warning indicators. Because behaviors are very
highly variable kind of thing, and so you expect that even very small levels
of contaminants could induce changes in behavior long before you see six
legs growing out of frogs.”


Clodfelter says people, such as amateur bird watchers, have helped wildlife
officials identify odd animal behavior.


His review was published in the British research journal Animal Behavior.


For the Great Lakes Radio Consortium, I’m Mark Brush.

Related Links