Bloomberg: Humans are causing irreversible damage to the planet from burning fossil fuels, the biggest ever study of the available science concluded in a report designed to spur the fight against climate change. Theres a high risk of widespread harm from rising global temperatures, including floods, drought, extinction of species and ocean acidification, if the trend for increasing carbon emissions continues, a panel convened by a United Nations body said today in Copenhagen. Humans can avoid the worst if...