Tony Green, a motivational speaker focusing on environmental issues, will discuss Project Drawdown at a meeting of Tri-Valley Citizens’ Climate Education, from 6:30-8:30 p.m., Tuesday, March 24, at the Livermore Public Library, 1188 S. Livermore Ave.

Project Drawdown is a nonprofit organization formed by California environmentalist Paul Hawken in 2014 to research and promote a path to “drawdown,” the point at which greenhouse gases begin to decline. Hawken’s 2017 book, “Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming,” was based on the project’s work. Copies of “Drawdown” will be available for review at the meeting.