Study of tree rings, corals and ice cores finds unnatural spike in temperatures that lines up with man-made climate change.
Apple is cleaning up its energy act.
Yep: all 12 months, in all 50 states.
China’s radical blue-sky measures during the 2008 Olympics actually improved Beijingers’ cardiovascular health — if only for a few weeks.
Two scientists involved in Spice project to simulate the cooling effect of volcanoes had submitted patents for similar technology.