BBC: A landmark report says scientists are 95% certain that humans are the "dominant cause" of global warming since the 1950s. The report by the UN's climate panel details the physical evidence behind climate change.
Here are a selection of reactions to the report.
Paul Nurse, president of the Royal Society
It is becoming increasingly clear that we are responsible for warming of the Earth primarily due to the burning of fossil fuels. Predicting the implications of this or how the picture will...