too. something you don't hear out in a cornfield. there's so much more not only the plant biodiversity but the wildlife diversity. >> it's life. >> exactly. >> reporter: justin takes advantage of a federal program that pays him to let pot of his fields go wild, which brings higher yields in the long term. over in nebraska, brian honeycutt is trying out cutting-edge science funded by bill gates that uses bacteria instead of synthetic fertilizer, the stuff that creates ocean dead zones and red tides. >> that's the petroleum-based industry we live in. the more we can move to more natural bacteria based, that's better for all of us. >> reporter: and even some conservatives like ray gasser are joining this green revolution, even though the republican refuses to blame a warming planet on human habits. >> so how do you feel about big members of your party, even the president casting doubt and skepticism into whether or not