This issue brief highlights the latest major research in climate change science and technology. It presents a synthesis
of current understanding of global warming at a critically important time, as the world continues to negotiate a comprehensive international climate agreement and countries begin to implement their national greenhouse gas emission reduction targets and actions.

This annual review highlights the latest major research and innovations in climate change science and technology. It presents a timely synthesis of current understanding of global
warming at a critically important time for the United States and the world.