"Rising temperatures, drought and the spread of destructive insect pests will shrink the North American range of the lodgepole pine nearly 10 percent by 2020, a new study finds."

"U.S. officials on Thursday cleared scientists of charges that they manipulated data about climate change in e-mails that were stolen from a British university in 2009, triggering a climate scandal."

"A federal judge [Wednesday] appeared reluctant to ask the Obama administration to reconsider whether the polar bear should be listed as threatened under the Endangered Species Act."

"Climate change is a major obstacle to a 2004 global treaty aimed at cutting exposure to 21 highly dangerous chemicals, says a new U.N.-commissioned report issued Monday. The 66-page report says the risks of exposure could increase if more stockpiles and landfills leak due to flooding, or other extreme weather linked to rising temperatures."

"Pollen season is lengthening in proportion to warming observed in North America: An extra two weeks, on average, across Wisconsin, Nebraska, Minnesota and almost a full month in the Canadian breadbasket."

"WASHINGTON -- Fifty million 'environmental refugees' will flood into the global north by 2020, fleeing food shortages sparked by climate change, experts warned at a major science conference that ended here Monday."

"Strict curbs on soot and ozone air pollution would limit global warming by 0.5 degree Celsius (0.9 F) in a step toward achieving tough world climate goals, a U.N.-backed study showed on Friday."