Behind a small, nondescript building in Efland, a gravel driveway reveals an old textiles manufacturing warehouse, biodiesel production tanks and rows of vegetables at the Orange County Eco-Innovations Park. A fleet of buses that run on biodiesel sit across from the warehouse. “This pink party bus runs green!” whimsical slogans on the front say. “We are a revolution in motion!” Because of the coronavirus, the buses have been out of commission, and the Eco-Innovations Park’s founder and General Manager Marc Dreyfors is busy working to to keep his nonprofits and businesses afloat. “That was a blow to us,” Dreyfors said of the buses. Walking across the sun-baked grounds toward potted hemp plants and rows of vegetables, Dreyfors stops to examine the squashes and help a worker fix a stand of tomatoes that have drooped over. Dreyfors’ main enterprise is the nonprofit, The Forest Foundation, which he founded in 2001. It’s the umbrella organization for Carolina Biofuels, Greenway Transit, Green Tracks, Forests of the World, and the newest business, CannDo CBD Oil. After a grant application …