| about.com | Fossil Fuels, Renewables and Nuclear Power - About.com |
| dsireusa.org | Database of State Incentives for Renewable Energy |
| cleanenergy.de | Cleanenergy: Infoportal Für Erneuerbare Energien |
| case.gov.au | International Centre for Solar Energy |
| irecusa.org | Interstate Renewable Energy Council |
| topix.net | Topix.net: Alternative Energy |
| auth.gr | Institute of Solar Technology |
| nrel.gov | DOE: National Renewable Energy Laboratory (NREL) |
| montanagreenpower.com | Montana Green Power |
| hawaii.gov | Renewable Energy Resource Assessment Report |
United States , Arizona , Scottsdale