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This is how much temperatures would rise by 2100 even if nations meet initial Paris pledges to reduce carbon emissions; this rise could still submerge coastal cities and drive over half of all species to extinction.
To meet this minimum goal, the Paris accord requires countries to tighten emissions targets every five years. Even this increase could sink some islands, worsen drought and drive a decline of up to a third in the number of species.
This is the most ambitious goal for temperature rise set by the Paris Agreement, after a push by low-lying island nations like Kiribati, which say limiting temperature rise to 1.5°C could allow them to survive.
This is how much temperatures have risen since the industrial age began, putting us 40% of the way to the 2°C point.
The baseline here is average global temperature before the start of the industrial age.
This appears in the December 28, 2015 issue of TIME.