Long seen as a means to reduce carbon dioxide emissions from transportation, biofuels may be less "green" than anticipated if put to greater use, according to Bob Howarth (2000) and Alan Townsend (2001). Their work was featured in the Economist on April 8.
Rising temperatures may make trees more susceptible to drought, David Breshears (2009) and his colleagues have found through a series of experiments in the Arizona desert. Hear David’s