U.S. eyes ozone treaty to curb warming gas Momentum was building Thursday for a novel Obama administration strategy: Use the U.N. treaty to fix the ozone hole as a way to enact mandatory reductions in a key greenhouse gas. [News Source]

U.S. eyes ozone treaty to curb warming gas Momentum was building Thursday for a novel Obama administration strategy: Use the U.N. treaty to fix the ozone hole as a way to enact mandatory reductions in a key greenhouse gas. [News Source]

Freeman Dyson and the irresistible urge to be contrary about climate change (Scientific American) Eminent physicist Freeman Dyson raised eyebrows a month ago when he told the New York Times Magazine that a little extra carbon dioxide--and global warming--might turn out to be good for the planet. So when we saw his name on an event around the corner from Scientific American's offices we figured we'd go hear his criticisms, dubbed "Climate Disasters, Safe Nukes and Other Myths," firsthand. ... [News Source]

Special Report: Climate change demands wind energy (Simcoe.com) Wind energy advocate and entrepreneur Derek Tennant says you can't be on the fence about global warming. [News Source]

Arctic nations must act at UN climate change conference: ministers (CBC) Foreign affairs ministers from Canada and seven other Arctic countries wrapped up top-level meetings in Norway on Wednesday, having been urged to make commitments on climate change at an upcoming United Nations conference later this year. [News Source]

Humanity’s carbon budget set at one trillion tonnes. No more than one-quarter: that's the proportion of existing reserves of oil, gas and coal that we can burn if we are serious about keeping the planet from warming by 2°C or more. [News Source]

World ‘unlikely to stop global warming reaching critical levels.’ Two studies on climate change have concluded that rises in global temperatures are unlikely to remain below a critical threshold deemed by the world's governments to be safe. [News Source]

World is ‘halfway to reaching dangerous climate change limit.’ The world has already produced half the total carbon emissions needed to create a global temperature rise of 2C, which could lead to 'dangerous' climate change, scientists warned today. [News Source]

World can burn 25 percent of oil, coal safely: study. The world can burn only a quarter of proven reserves of oil, gas and coal to be confident of staying within safer climate limits, unless untested carbon fixes work, experts said in two studies published in the journal Nature on Wednesday. [News Source]

A limit for carbon emissions. To prevent Earth’s average temperature from rising more than 2 degrees Celsius above preindustrial levels, several teams of researchers suggest that policymakers limit cumulative carbon emissions to no more than 1 trillion metric tons. [News Source]

Climate countdown: half a trillion tonnes of carbon left to burn. The world has already burned half the fossil fuels necessary to bring about a catastrophic 2C rise in average global temperature, scientists revealed today. [News Source]