Ten years ago today, on 12 December 2015, the leaders of 195 countries, meeting in France at the United Nations Climate Change Conference (COP21), ratified the Paris Agreement. The signatory countries pledged to "strengthen the global response to the threat of climate change". It was a moment described by many as historic.
The aim was to keep "the global average temperature increase well below 2°C above pre-industrial levels" and to continue efforts "to limit the temperature increase to 1.5°C above pre-industrial levels".
