Guardian: London Mayor Sadiq Khan has joined forces with city leaders from around the world to call on governments to take urgent action on climate change.
Ahead of a meeting of the G20 group of leading nations in Hangzhou, China, 30 mayors from cities including London, Paris, Tokyo, Sydney, New York, Cape Town and Rio de Janeiro called on national leaders to work with them to build a low carbon, climate safe world.
They welcomed government moves to secure the Paris Agreement, the worlds first comprehensive...