When was the last time you heard a positive story about climate change, a story about someone with a new idea or innovative solution to help reduce our carbon footprint?

This is that story. Michael Greenstone is a Professor of Economics at the University of Chicago, Director of the Energy Policy Institute of the University of Chicago (EPIC) and former chief economist in the Obama White House. Now, he’s developed a new nonprofit called Climate Vault, which could be a powerful new tool in the fight against climate change, and it’s built around a simple idea: outbidding polluters for the right to pollute.