The world has less than five years to get carbon emissions under control or runaway climate change will become inevitable, the World Wildlife Fund (WWF) has warned.
Scientists generally agree that the world could keep temperature rises below a dangerous level of two degrees C (3.6 degrees F) if greenhouse gas emissions are halved by 2050. However a new report from the WWF found this will require a "green industrial revolution" by 2014, with heavy investment in moving from fossil fuels to 'low carbon alternatives' like wind, solar, nuclear and clean coal.