After a decade of deliberation, the US state of California may soon let its companies meet part of their emission-reduction obligations by saving forests in places like the Mexican state of Chiapas. For it to work, the process must not only be socially and scientifically rigorous; it must also be well-communicated.
Houston is drowning and the Brazilian Amazon is baking while average global temperatures seem destined to rise at least 1.5 degrees Celsius over the next century. That's the threshold beyond which climate science gets foggy, and it's gonna be a challenging hundred years, to say the least, but there's reason to celebrate this Earth Day.
When climate negotiators signed off on the historic Paris Agreement in December, they opened the door for countries to begin cross-border trading of greenhouse-gas emission reductions and signaled the advent of a price on carbon, which world leaders from Canada's Justin Trudeau to Ethiopia's Hailemariam Desalegn say is needed to get companies slashing greenhouse-gas emissions today.