American Council for an Energy Efficient Economy

American Council on Renewable Energy

Alliance to Save Energy

Listing of incentives for renewable energy & energy efficiency projects

Environmental Portal and Search Engine

Environmental News Network

US Environmental Protection Agency

Green Business

Energy Star

News and information

Online calculators

Government efficiency program

Newsletter on renewable energy

Sustainable buildings industry council

Association of Energy Engineers

Department of Energy information page

International Institute for Sustainable Development

Waste and Resources Action Programme – Creating markets for recycled resources

Climate Analysis Indicators Tool from the World Resources Institute

Whole Building Design Guide