The rules, which come two decades after Congress ordered the agency to regulate toxic air pollution, would give power plants nationwide just three more years to slash mercury and other harmful emissions. But some big power plants are angling for more time.
The vast, untapped natural gas reserves in Pennsylvania's Marcellus Shale are the subject of much debate. Scientists who are trying to shed light on the safety of drilling are facing a host of obstacles, including lack of funding and data. Susan Phillips Scientists who are trying to shed light on the safety of drilling are facing a host of obstacles.
The United Nations climate conference in Durban, South Africa, was scheduled to wrap up Friday, but the negotiations have gone into overtime. Host Scott Simon talks with NPR's Richard Harris about what is still under discussion.
Astronomers at the University of California, Berkeley, recently discovered two massive black holes more than 300 million light-years away and 10 billion times the size of the sun. Host Scott Simon talks with Professor Chung-Pei Ma, who led the team that published the study.
The basic idea is to have rich countries that emit lots of climate-warming gases pay poorer countries to keep their forests, or even expand them. That's because forests suck carbon from the atmosphere. But there's not yet a global system to make a plan like this work.
Key portions of the Kyoto Protocol are set to expire at the end of 2012. But many of the world's major greenhouse gas emitters have already set national targets to reduce emissions, and they're forging their own initiatives to meet those goals.
In Asia's Space Race: National Motivations, Regional Rivalries, and International Risks, Naval Postgraduate School professor James Clay Moltz discusses the potential militarization of fast-growing space programs in China, India, and Japan--and why US military officials are keeping watch.
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