The Paris Agreement is an agreement within the framework of the United Nations Framework Convention on Climate Change (UNFCCC). It deals mainly with greenhouse gas emissions mitigation, adaptation and finance starting in the year 2020. An agreement was negotiated by representatives of 195 countries in Paris in December 2015. It was signed on 22 April 2016. The official website has webcasts and signatories.
Background on the treaty and UK position is given in a House of Commons Library briefing published on 13th April 2016.
UNDP background on climate change has videos and perspectives from a development studies perspective.
See reaction from IIED.