CNN: A team of international scientists led by Dr James Hansen, director of NASA’s Goddard Institute for Space Studies, say that carbon dioxide (CO2) levels are already in the danger zone. The Aletsch glacier in the Alps. Melting of mountain glaciers is accelerating worldwide. Concentrations of CO2 in the atmosphere currently stand at 385 parts per million (ppm) and are rising at a rate of two ppm per year. This is enough, say the scientists, to encourage dangerous changes to the …