City leaders unite in call for tougher climate action
The mayors of Paris, London and eight other major European cities have called on lawmakers to cut the continent's greenhouse gas output to zero by 2050 to help limit global warming to 1.5 degrees
The mayors of Paris, London and eight other major European cities have called on lawmakers to cut the continent's greenhouse gas output to zero by 2050 to help limit global warming to 1.5 degrees