Reuters: Large-scale solutions to help slow global warming often threaten the very indigenous peoples who are among those hardest hit by a changing climate, the U.N. University said on Wednesday. Biofuel plantations, construction of hydropower dams and measures to protect forests, where trees soak up heat-trapping carbon dioxide gas as they grow, can create conflicts with the ancestral lands of indigenous peoples. "Biofuel production, renewable energy expansion (and) other …