As governments prepare to resume climate negotiations in Lima in December, a key issue is the commitments countries are making to reduce their greenhouse gas emissions after 2020. A new report from the United Nations Environment Programme quantifies the magnitude for those commitments that will be needed in order to have a likely chance of limiting global warming to 2 degrees C (3.6 degrees F) relative to the pre-Industrial era and thereby avoiding the most extreme effects of climate change. Read more