“Displace fossil fuels. Grow more trees. Fight climate change.” Says Enviva, the world’s largest producer of industrial wood pellets. Smithfield Foods, the largest pork producer, says its projects capture methane from hog manure and convert it into “clean, low-carbon renewable natural gas.” Environmental advocates pushed back … at a Climate Week panel in New York last month. “Wood pellet biomass, manure biogas and crop-based biofuels are dirty, expensive and only harm our climate, environment and communities,” said Matt Williams, with the Natural Resources Defense Council, in opening remarks at “Bio-Energy or Bio-Scam: A Course Correction for Climate and Communities,” a panel at the event. As the impacts of climate change … grow harder to ignore, the bioenergy industry, which turns trees and animal waste into fuel, is pitching itself as a clean alternative to fossil fuels. Critics say those claims leave out the costs to the climate and to nearby communities.