Scientists are more certain than ever that humans are causing the majority of climate change, a key UN report has shown.
The first part of the Intergovernmental Panel on Climate Change's (IPCC) fifth assessment report shows that warming in the climate system is "unequivocal" and human influence on the climate is clear.
The report, which has been published after line-by-line scrutiny by scientists and policymakers, said they are 95% certain that the majority of the warming since the 1950s is down to human activity.
The likelihood is up from a 90% certainty in the last IPCC study in 2007.
Presenting the most vivid evidence to date, the UN's IPCC report has warned that humans are responsible for changes to the earth's climate.
The UN IPPC report into climate change, due out tomorrow, will say scientists agree the world is getting warmer, and humans are to blame.