Inside Climate News: U.S. President Barack Obama, Canadian Prime Minister Justin Trudeau and Mexican President Enrique Pena Nieto agreed to a set of common climate goals in a summit this week.
It is an easy climate goal to articulate: By the year 2025, the three nations of North America will generate half their combined electricity in ways that don't add to global warming.
The new goal, put forth at a tripartite summit meeting this week by the leaders of Canada, the United States and Mexico, might well mark a turning...