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A new study explores how rising temperatures helped influence a series of events that likely led to Syria’s civil war. The findings were published in the “Proceedings of the National Academies of Science.” From 2007 to 2010, the researchers said, Syria suffered the worst drought in its recorded history. Climate scientist Colin Kelley wrote the Syrian study. He said crops failed and farm animals died across the country. He said the changing conditions forced an estimated 1.5 million people from their homes. They joined other refugees from the war. Temporary housing was built in Syrian communities for the new arrivals. These communities are where fighting first broke out in 2011. In their report, Colin Kelley and his team suggested that climate change made the drought more likely. They said that global warming made the drought more severe and that this set about a chain of events that led to the uprising. But Kelley said his team is not saying that global warming or climate change caused the uprising in Syria. Another report suggests climate change has made the extremely dry weather in the western United States more likely. Noah Diffenbaugh is a Stanford University climate scientist. He said that years of little rainfall are much more likely to produce severe drought if they occur with warm conditions. Diffenbaugh added that California has been in a very clear long-term warming period. In new research, he and other researchers said that has made droughts like the current one more likely.