Business Green: A draft report from the US State Department has emphasised the urgent need to take action to curb greenhouse gas emissions, arguing that human activity is unequivocally leading to global warming and that rising temperatures pose a grave threat to the global economy. The 193-page draft report is the fifth study to be produced for the US for submission to the UN’s climate change secretariat and was released to little fanfare earlier this month. However, a group of environmental …