Guardian: When it comes to confronting climate change, the worlds cities are proving that theres strength in unity. The historic climate agreement reached in Paris in December, which was approved by nearly all of the worlds nations, was made possible in part by the progress that cities have made by working together.
Today, the two biggest coalitions of cities in the world the EU-based Covenant of Mayors and the UN-backed Compact of Mayors are forming an alliance to link more than 600 million city...