] NASA scientists say soot, mostly from diesel engines, is ] causing as much as a quarter of all observed global ] warming by reducing the ability of snow and ice to ] reflect sunlight. ] ] Their findings on how soot affects reflective ability, ] known as albedo, raise new questions about human-caused ] climate change from the Arctic to the Alps. Gee... watching all those 18 wheelers on the interstates belch clouds of black, ***BLACK*** smoke when they downshift, who would have EVER guessed they were having an impact on the earths albedo??? LB |