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"PARIS — President Obama and more than 100 world leaders will convene with thousands of diplomats on Monday on the outskirts of Paris to open two weeks of intense negotiations aimed at forging an accord that could begin to avert the most devastating effects of global warming and redefine the economy of the 21st century."

"Did climate change cause that heat wave? That hurricane? That drought? A new collection of studies examined extreme weather events last year, including drought, floods and storms, to look for signs that climate change was a cause or contributor — and found mixed results."

Melting glaciers in Glacier National Park are endangering stoneflies which are dependent on cold water. In the coming year, federal biologists will decide whether such insects deserve endangered species status.

"By the end of this century, areas of the Persian Gulf could be hit by waves of heat and humidity so severe that simply being outside for several hours could threaten human life, according to a study published Monday. Because of humanity’s contribution to climate change, the authors wrote, some population centers in the Middle East 'are likely to experience temperature levels that are intolerable to humans.'"