Climate
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		ClimateTropics leave trace in Arctic warming
Cooling temperatures in the Pacific may be responsible for the recent rapid warming of northeastern Canada and Greenland.
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		ClimateCrop nutrients may drop as carbon dioxide rises
Many staple grains and legumes pack 5 to 10 percent less iron, zinc and protein when grown at carbon dioxide levels expected midcentury.
By Beth Mole - 			
			
		ClimateFederal report details climate change in U.S.
The latest National Climate Assessment was released by federal officials May 6.
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		ClimateGlacial microbes gobble methane
While some bacteria produce methane in Greenland’s melting ice sheet, others may consume the greenhouse gas as it escapes.
By Beth Mole - 			
			
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		ClimateReef fish act drunk in carbon dioxide–rich ocean waters
In first test in the wild, fish near reefs that bubble with CO2 lose fear of predators’ scent.
By Meghan Rosen - 			
			
		ClimateOcean bacteria may have shut off ancient global warming
Ocean-dwelling bacteria may have helped end global warming 56 million years ago by gobbling up carbon from the CO2-laden atmosphere.
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		ClimateIPCC calls for swift switch to alternative power
Rapid adoption of green power production will be necessary to avert a climate crisis, latest IPCC report says.
By Beth Mole - 			
			
		ClimateWorld unprepared for changing climate, IPCC says
The latest intergovernmental report says planetwide impacts continue.
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		PaleontologyMicrobes indicted in ancient mass extinction
About 252 million years ago an estimated 96 percent of all species were wiped from Earth, and now scientists have a new suspect in the killing — methane-belching microbes.
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		AnimalsAs their homes warm, salamanders shrink
Many species of salamanders respond to climate change by getting smaller.