Quartz: After months of preparation and weeks of negotiation, world leaders have reached a climate-change deal at this year's Conference of Parties (COP21) in Paris. It is the most ambitious international agreement ever to face up to the threat of global warming, as the final text of the deal makes clear.
Here are the main points:
An aim to keep global mean temperature within 1.5°C of that which existed before the industrial era. This is a more ambitious goal that the 2°C goal that nearly 200 governments...