Environmental scientist Peter Kareiva discusses how mobile technology and social networking websites may help to inspire the next generation of conservationists.

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Added: Fri Sep 30 19:40:20 UTC 2011
Air date: Fri Sep 30 00:00:00 UTC 2011
Duration: 02:14

Environmental scientist Peter Kareiva examines a recent study comparing the brains of city dwellers to individuals living in rural areas -- with results that may suggest interesting links between nature and overall health.

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Added: Fri Sep 30 00:15:16 UTC 2011
Air date: Fri Sep 30 00:00:00 UTC 2011
Duration: 02:23

Urban planner Peter Calthorpe visualizes humanity's ecological footprint by examining demand we make of the planet in terms of land area. It's easy to see, says Calthorpe, that humans "are now demanding more of the planet than the planet has to give."

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Added: Tue Aug 16 02:26:11 UTC 2011
Air date: Tue Aug 16 00:00:00 UTC 2011
Duration: 03:47

According to journalist Mark Hertsgaard, the United States remains the only advanced industrial nation still debating the existence of climate change. Why? Hertsgaard blames a small hard-core minority with a very large "megaphone."

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Added: Wed Aug 03 23:01:10 UTC 2011
Air date: Thu Aug 04 00:00:00 UTC 2011
Duration: 03:27

Is it a natural characteristic of life on Earth to be self-destructive? Tim Flannery, author of Here on Earth, argues against Peter Ward's "Medea Hypothesis," which proposes that multicultural life is inherently suicidal.

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Added: Sat Jun 25 01:27:07 UTC 2011
Air date: Sat Jun 25 00:00:00 UTC 2011
Duration: 02:15

Bill Gates reflects on the future of nuclear power in the aftermath of the Fukushima disaster in Japan. "Software simulation changes the game," argues Gates, highlighting the advantage of being able to virtually test new designs before building them.

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Added: Fri May 13 05:52:11 UTC 2011
Air date: Fri May 13 00:00:00 UTC 2011
Duration: 03:24

From the Tea Party to the Koch brothers, conservationist Ellie Cohen speaks out against opposition to environmental reforms. Cohen defends the science behind global warming, and encourages activists to continue fighting for political action on the issue.

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Added: Wed Apr 13 03:51:12 UTC 2011
Air date: Tue Apr 12 00:00:00 UTC 2011
Duration: 02:50

Local food advocate Joel Salatin criticizes what he views as modern society's misguided and overzealous attitude towards food safety. In our current efforts to regulate food production for mass consumption, are we actually making it more dangerous?

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Added: Wed Mar 16 01:53:10 UTC 2011
Air date: Tue Mar 15 00:00:00 UTC 2011
Duration: 05:24

In this vivid photo sequence, botanist Patrick Blanc showcases several iterations of his famous "vertical gardens." These artistic, wall-scaling installations serve as tributes to nature among densely-populated urban environments.

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Added: Sat Feb 26 08:04:11 UTC 2011
Air date: Fri Feb 25 00:00:00 UTC 2011
Duration: 03:39

Environmental scientist Jane Long examines an idea to fight climate change by spraying sulfuric aerosols into the atmosphere. Although cheap and effective, Long warns that the side effects of such a large-scale geoengineering effort would be unknown.

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Added: Sat Feb 05 11:25:11 UTC 2011
Air date: Sat Feb 05 00:00:00 UTC 2011
Duration: 05:45

Scientist Peter Roopnarine compares how early estimates of the Deepwater Horizon well's leaked oil compare with the final totals, and tracks where the disaster ranks on the all-time worst oil spills list.

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Added: Fri Dec 24 09:32:07 UTC 2010
Air date: Thu Dec 23 00:00:00 UTC 2010
Duration: 03:04

Nutrition labeling doesn't tell us much about bottled water, but that doesn't mean there's nothing of note in there. Water expert Peter Gleick explains how most bottled water contains similar minerals to tap water, with an added shot of marketing hype.

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Added: Mon Nov 15 00:26:07 UTC 2010
Air date: Sat Nov 13 00:00:00 UTC 2010
Duration: 04:41

Poverty or environmental degradation: which should society address first? According to economist Pavan Sukhdev, the issue is not that simple. He explains that development can impact biodiversity, with negative consequences for the poor.

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Added: Wed Oct 20 07:09:08 UTC 2010
Duration: 03:10

Dr. Rajendra Pachauri, Chair of the Intergovernmental Panel on Climate Change (IPCC), and Mary Nichols, Chair of the California Air Resources Board, dismiss skeptics' claims that humans are not contributing to global warming.

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Added: Fri Sep 24 23:01:10 UTC 2010
Duration: 03:46

Climatologist Ken Caldeira asserts that as long as excess carbon is emitted into the atmosphere, temperatures will increase. "The only plausible way in which we could start the earth cooling this century is to directly intervene in the climate system."

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Added: Sat Sep 18 13:33:08 UTC 2010
Air date: Sat Sep 18 00:00:00 UTC 2010
Duration: 02:23

Environmental advocate Van Jones reflects on the BP oil spill in the Gulf of Mexico and what America can learn from the catastrophe. "I've never heard of a wind slick; I've never heard of a sun spill," says Jones. "There's a better way."

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Added: Sat Aug 28 11:19:08 UTC 2010
Air date: Fri Aug 27 00:00:00 UTC 2010
Duration: 05:16

"If you wanted to design a problem that people would not care about, it would basically look like global warming," says behavioral economist Dan Ariely. His solution? Manipulate the variables people do care about -- like their egos.

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Added: Sat Aug 14 19:34:11 UTC 2010
Air date: Fri Aug 13 00:00:00 UTC 2010
Duration: 04:10

Conservationist Julia Whitty discusses the environmental impact of the BP oil spill on the Gulf of Mexico and beyond, calling surface pollution "the tip of the oilberg." The most severe damage, says Whitty, will be to the ocean's deep scattering layer.

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Added: Sat Aug 14 19:34:11 UTC 2010
Air date: Sat Aug 14 00:00:00 UTC 2010
Duration: 03:23
Rating: 4.2 / 5.0

Environmentalist Julia Whitty accuses BP of using oil dispersant and methanol to distort data on how many barrels of oil have spilled into the Gulf of Mexico. She's convinced BP is simply "working the angles" for their inevitable day in court.

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Added: Tue Aug 17 00:37:08 UTC 2010
Air date: Wed Jul 14 00:00:00 UTC 2010
Duration: 01:49

San Francisco Mayor Gavin Newsom explains plans to build power-generating tidal platforms 5 miles off of San Francisco's coast, as well as an "inverted wind farm" under the Golden Gate Bridge.

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Added: Fri Sep 25 00:38:10 UTC 2009
Air date: Thu Apr 09 00:00:00 UTC 2009
Duration: 02:46