Bill McKibben at 350.org’s recent Rally to End Fossil Fuel Subsidies. (Photo by 350.org.)

In just a few weeks, world leaders are converging on Rio for a landmark “Earth Summit” to talk about sustainability issues — but it’s time for them to stop talking and start doing. And we know where they can begin.

This year our governments will hand nearly hundreds of billions of dollars in government subsidies to the coal, gas, and oil industries. Instead, they should cut them off.