US President Donald Trump has accused climate change scientists of having a "political agenda" as he cast doubt on whether humans were responsible for the earth's rising temperatures.
Trump: Climate change scientists have agenda
Last week's report by the Intergovernmental Panel on Climate Change (IPCC) - the leading international body evaluating climate change - warned the world was heading towards a temperature rise of 3C.
Scientists say that natural fluctuations in temperature are being exacerbated by human activity - which has caused approximately 1C of global warming above pre-industrial levels.
The report said keeping to the preferred target of 1.5C above pre-industrial levels will mean "rapid, far-reaching and unprecedented changes in all aspects of society".