Yale Environment 360: Heat generated in major metropolitan areas is altering the character of the jet stream and other atmospheric systems, at times affecting the weather thousands of miles away, a new study says. Writing in the journal Nature Climate Change, a team of scientists reports that so-called waste heat produced from buildings, cars, and other sources is altering weather patterns and increasing winter temperatures across large areas of North America and northern Asia by as much as 1 degree C (1.8 degrees F)....