"Atmospheric levels of methane, 20 times more powerful than carbon dioxide (CO2) at trapping heat, stayed steady for two decades to 2006 on wider fertilizer use to grow rice or a surge in natural gas demand, according to two separate studies in the journal Nature.

Climate researcher Fuu Ming Kai from the Massachusetts Institute of Technology's Singapore research center said in one study that methane output from rice fields in the Northern Hemisphere dropped during the period as fertilizers replaced manure and because of reduced water use.

"Ready or not, the era of big data is coming to ecology. After years of discussion and debate, the United States is moving forward with an environmental moni­toring network that promises to help transform a traditionally small-scale, local science into a continental-scale group enterprise."

"Greenpeace and the Center for Biological Diversity have asked the Department of the Interior to look into whether the recent suspension of a biologist violates rules meant to protect scientific research from political interference.

The news of the suspension has prompted widespread debate, with environmental groups alleging a connection to plans to drill oil in the Arctic reserve.

"NASA, the agency best known for exploring space, is trying to answer some urgent questions about air pollution right here on Earth."

The Interior Department scientist who first warned of climate change as a threat to polar bears in a 5-year-old peer-reviewed paper has been suspended. The Obama administration has been accused of hounding him so it can open up the fragile Arctic to drilling by Shell and other companies.

"Climate scientists have turned to the United States and Australian navies to deploy robotic measuring devices in the Indian Ocean where pirates have made the area too dangerous for researchers."