A body sanctioned by the UN, the Intergovernmental Panel on Climate Change, issued its latest and most dire assessment about the state of the planet and the impact of human behaviour on the climate.
It found global warming is unfolding more quickly than feared and humanity is almost entirely to blame.
Professor of Political Science and International Relations at the University of Canterbury Professor Bronwyn Hayward is a member of the IPCC core writing team.
She spoke to Corin Dann.
