We’ll be springing ahead three weeks earlier than usual this
year. Congress has extended daylight saving time because the
politicians say it will save energy. Rebecca Williams reports
critics are not so sure:
Transcript
We’ll be springing ahead three weeks earlier than usual this
year. Congress has extended daylight saving time because the
politicians say it will save energy. Rebecca Williams reports
critics are not so sure:
Fans of extending daylight-saving time say longer daylight hours
in the evenings will save energy.
But critics of the change say it might actually be a wash.
Ryan Kellogg is a researcher at the University of California
Energy Institute. He studied what happened when Australia
extended daylight saving time.
“They did experience decreased electricity use in the evening
hours when they had more natural light. But they also saw
increased use in the morning when people were waking up in the
dark. Those two effects canceled each other out so on net,
extending daylightn saving time didn’t save Australia any energy
at all.”
U.S. politicians have been predicting we could save the
equivalent of 100,000 barrels of oil a day by extending daylight
saving time. But critics say that’s misleading because most power
plants don’t run on oil.
The U.S. economy could save billions of dollars a year if the government
would screen for invasive species. Lester Graham reports that prediction is
based on a recent study on screening out problem plants:
Transcript
The U.S. economy could save billions of dollars a year if the government would
screen for
invasive species. Lester Graham reports, that prediction is based on a recent study
on
screening out problem plants:
The study shows when a country screens for potentially harmful species of plants that
could spread like weeds, the cost of the screening is miniscule compared to the cost
of
the damage the plants cause. The study is published in the Proceedings of the
National
Academy of Sciences. It looked at the costs and benefits of Australia’s invasive
species
screening program.
Phyllis Windle specializes in invasive species. She’s with the environmental group
Union
of Concerned Scientists. Windle says it’s long been assumed that screening out pesky
plants would be worth the cost.
“But what this study does is that it really shows that prevention pays off and it
has good
data to illustrate that.”
Factoring in the scale of the U.S. economy to Australia’s, the Union of Concerned
Scientists estimates for an annual cost of a few million dollars, the U.S. economy
could
be spared a few billion dollars in damage by invasive plants.
For the Environment Report, this is Lester Graham.
Prairie plants are being lost to development.(Courtesy of Fermi National Accelerator Laboratory)
Many modern medicines come from prairie plants or the fungus that is found beneath them. (Courtesy of Fermi National Accelerator Laboratory)
You’ve heard about the ark Noah built to save the world’s animals. Now comes news of another kind of ark – one designed to help save the world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman has that story:
Transcript
You’ve heard about the ark Noah built to save the world’s animals. Now
comes news of another kind of ark – one designed to help save the
world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman
has that story:
(Sound of walking through the prairie up then under)
You might say Pati Vitt is looking for the right stock to fill the ark.
She’s dressed in jeans and a t-shirt, her long brown hair in braids, a field
notebook in hand, and a pencil tied to her pants. For nine months of each
year, she wanders along railroad tracks, through old cemeteries and
nature preserves, filling shopping bags with the seeds of prairie plants.
Vitt is a conservation scientist with the Chicago Botanic Garden. She has
studied these plants since she was a child. She knows their Latin names.
She dreams about them at night. She even knows the intimate details of
their reproductive lives:
“One does it having teeny little flowers and taking small little bees, and
another one does it by having huge flowers and lots of nectar and they
have really big bees or maybe a moth that pollinates them.”
And, she says, prairie plants are hearty. Native to the Upper Midwest,
they can handle icy winters and long, hot droughts, but they can’t fight
plows or bulldozers. Farmers and developers have destroyed almost all
the land where prairie plants once grew. Today, one-tenth of one percent
of the original prairie remains.
“That means that what we’re looking at right here is one-tenth of one
percent of the population that this plant once enjoyed. I’m sorry. Even
though there’s a lot in this prairie, this plant should be endangered,
because there are so few acres of its habitat left and everyday we’re
coming and we’re taking more and more of it. The prairie habitat is more
endangered than tropical rainforest.”
That worries Vitt, not only because she thinks the prairie plants are
beautiful, but because they may have value to people. For example, she
says about half of our modern medicines came – originally – from plants
or the fungus found in the soil beneath them.
“If you think about penicillin… penicillin came from mold. We might be
standing on a treasure trove of antibiotics, which we need, but if we let
the plants go, we let the soil fungi go, we let the potential antibiotics go.”
(Sound of seeds dropping into a jar)
So Vitt is collecting prairie seeds from about 1,500 plants and shipping
them to the English countryside.
(Sound of birds)
Just south of London, the British government has built what it hopes will
be the largest seed bank in the world devoted to wild plants. The
building looks like a series of greenhouses made from concrete, stone,
glass and steel. In the basement, fire and bombproof vaults hold billions of
seeds from 24,000 species:
“That’s the exciting bit. We thought big.”
Michael Way is a scientist at the Millennium Seed Bank. He says it’s
needed now because a lot of wild plants are in danger of
disappearing because of global warming and the pace of human
development. Way believes a third of the world’s plant species could be
gone by 2050.
“You hope that the worst is not going to happen. Of course, from time to
time the worst does happen. If a plant population is destroyed, if a
decision is taken to build houses or factories or roads on a particular area
which was home to some quite special plants, seed banking is one tool
you can use to protect that genetic diversity that might be unique to that
site.”
Each day, seeds arrive from Africa, Australia, Europe, the Middle East
and the Americas. They sit in colorful plastic crates — waiting to be
cleaned, dried and frozen. Way says these seeds could survive for a
century or more.
“Seeds are tough – small but tough, and the whole point of seeds is to be
dormant and allow themselves to be transported around, so unless we do
something really stupid, they will remain viable.”
Back in the U.S., Pati Vitt says seed banks like the one near London
could mean the survival of humanity, since people can’t live without
plants.
“I think fundamentally we all understand that we are a part of nature, but
in our daily lives we get so cut off from it that we forget.”
She sees the Earth as a garden, and she wants people to act like
gardeners. Setting up seed banks is an important first step.
“We will have the tools that we need to bring things back if necessary.”
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.
Due to many different catalysts, including climate and habitat change, amphibians are said to be rapidly disappearing. (Photo by Linda Lundberg)
The most comprehensive study of amphibians ever done
shows nearly a third of species are threatened with extinction. The
Great Lakes Radio Consortium’s Erin Toner reports:
Transcript
The most comprehensive study of amphibians ever done shows nearly a third of species
are theatened with extinction. The Great Lakes Radio Consortium’s Erin Toner reports:
More than five hundred scientists from more than sixty nations were involved in the
recent Global Amphibian Assessment. The three-year study looked at the status of more
than 5700 known species of frogs, toads, caecilians, and salamaders. It found out that
more than thirty percent of them are near extinction. In the Americas and Australia,
outbreaks of a highly infectious fungal disease have hurt amphibian populations.
But worldwide, the report says the biggest factors for the decline are habitat destruction
and pollution. It also says since amphibians depend on freshwater to survive, the loss
of species shows the Earth’s freshwater supply is in danger. But scientists say the
negative trend could reverse with a swift commitment of resources, such as creating new
protective areas and captive breeding grounds, and better protection of fresh water.
For the Great Lakes Radio Consortium, I’m Erin Toner.
People who do historic restoration have been taking advantage of cloning technology. Historic trees are being cloned to help preserve and restore historic landscapes. The Great Lakes Radio Consortium’s Tamar Charney reports:
Transcript
People who do historic restoration have been taking advantage of
cloning technology. Historic trees are being cloned to help preserve and
restore historic landscapes. The Great Lakes Radio Consortium’s Tamar
Charney reports:
Michigan’s Fort Mackinac is a military fortress from the American
Revolution. In the mid 1800’s, soldiers stationed there planted a row of eight
sugar maples lining the fort’s parade ground. But these trees are now old
and dying.
Phil Porter is a curator who’s worked at Fort Mackinac for over
30 years. He says he was sad and concerned that they would soon lose this
living link to the fort’s past. So he decided to have the trees cloned.
“We think that by cloning them, by going to that very high level of
reproducing what is there now we can do the most accurate job of
reproducing the environment, the right looking trees, and putting them
back in the same place.”
While the clones won’t look any different from a sugar maple seedling
bought at a nursery, keeping the genes of a historic tree alive through
cloning seems to appeal to people. There are tree cloning projects
underway in Massachusetts, Maryland, and even Australia to help replicate
historic trees people have a connection to.
For the Great Lakes Radio Consortium, I’m Tamar Charney.
