Baker said a slowdown of ocean circulation, caused by global warming, could mean less heat brought by the oceans to Earth's high latitudes. And that means, in a warming world, Europe could get cold.
Geologist James Devine talks about how scientists could help Afghanistan manage the country's petroleum and copper reserves to revitalize the nation's troubled economy.
Experts say usable oil can be extracted from a rocky substance, called oil shale, that's abundant in western North America. But geologist Craig Cooper speaks of trade-offs in the energy and water extraction process.
She describes these dead zones, off the northwestern coast of the United States, as "virtual wastelands of dead crabs, dead worms, dead anemones, just littering the sea floor."
Fernando Pages builds homes that are affordable and green without the need for subsidies. Pages explains why green building is really advanced building, and how affordable and green go together.
The East Antarctic ice sheet may be at the end of the Earth, says geophysicist Donald Blankenship, but it's much more important than its distance implies. Hear Blankenship talk about his concern over melting ice sheets.
Environmental chemist Melissa Schultz talks about how medications we excrete and flush down the toilet are winding up in rivers, possibly harming wildlife.
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