Most prior studies have found that substituting biofuels for gasoline will reduce greenhouse gases because biofuels sequester carbon through the growth of the feedstock. These analyses have failed to count the carbon emissions that occur as farmers worldwide respond to higher prices and convert...

Human-induced temperature increase is amplified in the Arctic, as well as its effects on the ice cover. With the aid of an Arctic "death spiral”, Prof. Peter Wadhams, oceanographer and glaciologist at Cambridge University, discusses scientific evidence and his personal experience of changes in...