H. Leighton Steward: The Planet Needs CO2

Geologists H. Leighton Steward is chairman of Plants Need CO2.  He is a New York Times best-selling author and  Chairman of the Board of The Institute for the Study of Earth and Man at SMU, most recently Steward worked with a team of former NASA scientists known as “The Right Climate Stuff.” The NASA team includes scientists with expertise in physics, chemistry, geology, climatology, engineering, biology, and other fields