Telegraph: The new assessment by the Intergovernmental Panel on Climate Change states that it is "extremely likely" humans have been the principal cause of warming since the 1950s.
Without making "substantial and sustained reductions" of greenhouse gas emissions, the world can expect an increase of extreme weather including heatwaves and heavy rainfall.
Three out of four future climate change scenarios, based on projected levels of gas and aerosol emissions, suggest that by the end of this century global...