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DURBAN, South Africa When roughly 25,000 people descend on a city to talk climate change, you can expect at least two things: mountains of waste and copious emissions of the greenhouse gases that they’ve come to talk about so seriously. To offset the hundreds of thousands of tons of these lightweight gases emitted in the pursuit of a global climate treaty, recent such conferences have taken compensatory measures, such as subsidizing retrofits of Bangladeshi brick factories , so that ambassadorial emissions are offset by a reduction in pollution from kilns

A decade ago layers of shale lying deep underground supplied only 1 percent of America’s natural gas. Today they provide 30 percent

No geoengineering methods are ready for use to combat climate change, the Government Accountability Office said in a report released late last month, citing concerns about cost, effectiveness and adverse consequences. "Climate engineering technologies do not now offer a viable response to global climate change," GAO said in the report commissioned by former House Science, Space and Technology Committee Chairman Bart Gordon (D-Tenn.)

The evidence is in: global warming has caused severe floods, droughts and storms. We present a three-part series by John Carey, who was funded by the Pew Center on Global Climate Change, and other selections from the editors [More]

Mexico has begun a program to make its climate actions more transparent, a move it hopes will raise its credibility in the international community. If the plan works, it will prove a useful case for developing countries that know they need bulletproof data to draw respect, and cash, in global climate talks. [More]