An anonymous reader quotes a report from NPR: It is "extremely likely" that human activities are the "dominant cause" of global warming, according to the the most comprehensive study ever of climate science by U.S. government researchers. The climate report, obtained by NPR, notes that the past 115 years are "the warmest in the history of modern civilization." The global average temperature has increased by about 1.8 degree Fahrenheit over that period. Greenhouse gases from industry and agriculture are by far the biggest contributor to warming. The findings contradict statements by President Trump and many of his Cabinet members, who have openly questioned the role humans play in changing the climate. The report states that the global climate will continue to warm. How much, it says, "will depend primarily on the amount of greenhouse gases (especially carbon dioxide) emitted globally." Without major reductions in emissions, it says, the increase in annual average global temperature could reach 9 degrees Fahrenheit relative to pre-industrial times. Efforts to reduce emissions, it says, would slow the rate of warming.