TEHRAN, Jun 25 -Predicting where, how and how quickly Greenland's ice will melt is difficult. Projections by the best models are cloudy, and new research suggests clouds are doing the clouding.
TEHRAN, July 03 -As the climate warms, the atmosphere is capable of holding more moisture. The burning of fossil fuels also triggers the accumulation of water vapor into Earth's atmosphere, which, like CO2, is a greenhouse gas.