Global warming impacts 'severe, widespread, and irreversible', UN warns

Telegraph: "The world faces "severe, widespread and irreversible" effects of climate change unless it takes urgent action to limit global warming by cutting back on burning fossil fuels, the United Nations has warned in a leaked draft report.
Man-made global warming caused by greenhouse gas emissions is already here and its effects "might already be considered dangerous", according to the draft of the UN's Intergovernmental Panel on Climate Change (IPCC) report."