USDA. NAL. Alternative Farming Systems Information Center.

Renewable energy or energy created from natural sources is a hot topic in U.S. sustainable agriculture today. Learn how farmers are harnessing (and profiting from) alternative energy sources: wind, sun, water and energy crops.

U.S. Agency for International Development.

USAID’s renewable energy programs promote deployment, financing, and grid integration of renewable energy generation as a means to mitigate climate change while lowering costs, spurring economic growth, and increasing access to affordable modern energy services.

U.S. Department of Energy. Bioenergy Technologies Office (BETO) .

BETO supports groundbreaking bioenergy technologies to produce industrially viable fuels, products, and power using renewable biomass and waste resources.

USDA. Natural Resources Conservation Service.

Presents tools designed to increase energy awareness in agriculture and to help farmers and ranchers identify where they can reduce their energy costs. Includes energy estimators for these areas: animal housing, irrigation, nitrogen, and tillage.