H. Leighton Steward america first energyH. Leighton Steward will be speaking at the America First Energy Conference.

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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.” The 501(c)(3) is backed by the coal baron Corbin Robertson.

Leighton Steward was a signatory of a petition (PDF) organized by Richard Lindzen of the Cato Institute urging President Donald Trump to pull the United States out of the United Nations international convention on climate change (UNFCCC).