How aerosols affect our climate

For many, the word "aerosol" might conjure thoughts of hairspray or spray paint. More accurately, though, aerosols are simply particles found in the atmosphere. They can be human-made, like from car exhaust or biomass burning, ...

World temps maintain the heat of global warming

2011 is currently tied for the 10th hottest since records began in 1850 and Arctic sea ice has shrunk to record-low volumes this year, the U.N. weather office said Tuesday.