The Climate Action We Need

On December 12, 2015, the 195 country parties to the United Nations’ climate body adopted the Paris Agreement on climate change. The accord was historic, sending a message to governments, boardrooms, clean-tech innovators, civil society, and citizens that the leaders of the world had finally come together to combat climate change.

The agreement was groundbreaking in many respects. It cast aside the old paradigm in which climate obligations applied only to developed countries. It articulated...