Washington Post: In 11 days, on Earth Day, world leaders will assemble at the United Nations in New York to sign the Paris climate agreement. That document pledges to hold the planets warming to well below 2 degrees Celsius above pre-industrial levels, and even to aspire to a 1.5 degree C temperature limit.
The urgency of signing the agreement has been underscored by recent climate news and events, including devastating coral bleaching around the world, newly shattered temperature records and disturbing news...