Chad Frischmann is the vice president and research director of Project Drawdown, a nonprofit organization focused on the most potentially impactful responses to global warming. “Drawdown” isn’t a widespread concept:
It indicates the point in time when the concentration of atmospheric greenhouse gases begins to decline on a year-to-year basis — the moment when we take more gases out of the atmosphere than we put in. In collaboration
with his colleagues and with a global team of researchers, Frischmann has assessed, mapped, modeled and described the 100 most substantive solutions, calculating the positive carbon impact each would have and the relative costs and savings. Out of that work came the 2017 book Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming.