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H. Leighton Steward
Image courtesy of the Barack Obama Presidential Library
H. Leighton Steward
Image courtesy of the Barack Obama Presidential Library

H. Leighton Steward

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H. Leighton Steward is the President and Chairman of Plants Need CO2, a group founded in 2009 with the mission “to educate the public on the positive effects of additional atmospheric CO2 and help prevent the inadvertent negative impact to human, plant and animal life if we reduce CO2.