With a first-ever contest to evaluate power generation capability, the 2009 version of the popular Solar Decathlon will feature 20 teams of colleges and universities self-designing, building and opera

GENEVA -- The World Climate Conference has approved the creation of a new climate forecasting system to help countries adapt to climate change and enable them to better prepare for natural disasters,

Human-generated greenhouse gas emissions have helped reverse a 2,000-year trend of cooling in the Arctic, prompting warmer average temperatures in the past decade that now rank higher than at any time