A draft copy of a scientific report says the U-S is already feeling the effects of climate change. The study by scientists from 13 federal agencies in the U-S says since the 1980s, extreme heat waves have become more common, while periods of extreme cold are happening less often. It says greenhouse gas emissions will affect the degree to which global temperatures continue to rise. U-S President Donald Trump and several cabinet members dispute that, and one scientist cited anonymously by the The New York Times says he and other researchers fear the Trump administration will suppress the report’s release.