Project Drawdown is a climate change mitigation project initiated by Paul Hawken and climate activist Amanda Joy Ravenhill. Central to the project is the compilation of a list of the “100 most substantive solutions to global warming.”  The list, encompassing only technologically viable, existing solutions, was compiled by a team of over 200 scholars, scientists, policymakers, business leaders and activists; for each solution the carbon impact through the year 2050, the total and net cost to society, and the total lifetime savings were measured and modelled.
Paul Hawken has edited the book Drawdown: The most comprehensive plan ever proposed to reverse global warming to support the Project.
- "Drawdown". Project Drawdown. Retrieved 13 January 2016.
- Makower, Joel (22 October 2014). "Two Steps Forward: Inside Paul Hawken's audacious plan to 'drawdown' climate change". GreenBiz. Retrieved 13 January 2016.
- Book Passage (w/o date): “Paul Hawken - Drawdown (San Rafael).” Retrieved 16 March 2017.
- Project Drawdown homepage. Retrieved 16 March 2017.
- Project Drawdown (w/o date): “Solutions.” Retrieved 16 March 2017.
- Hawken, Paul (2017). Paul Hawken, ed. Drawdown: The most comprehensive plan ever proposed to reverse global warming. New York, NY: Penguin Books. ISBN 9780143130444.
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