March on the Paris climate talks image courtesy of John Englart under a Creative Commons Attribution-ShareAlike 2.0 Generic license (the image has been cropped)

Nearly 200 countries agreed in Paris to reduce greenhouse gas emissions in order to keep the average global temperature “well below” 2°C (3.6°F) above pre-industrial levels. The Paris Agreement was intended to reduce human carbon emissions below the amount that can be absorbed by natural carbon sinks by the second half of the century. National targets under the agreement are not enough to keep the temperature increase below 2°C, …