| 2020 Institute | | Advocates getting the United States into energy self-suffiency, and provides links for inviduals to find more information or purchase alternative energy sources. |
| Alliance to Save Energy (ASE) | | Promotes energy efficiency worldwide for economy, environment and security. Offers K-12 lesson plans, energy saving tips and resource links to other educational supportive information. |
| Alternative Energy Institute | | Describes the pros and cons of various renewable and non-renewable energy sources, advocates community awareness and creative solutions. |
| Alternative Technology Association (ATA) | | A non-profit community group that aims to use and promote environmentally friendly technology. ATA has around two thousand members across Australia, conducts regular meetings, workshops and courses, and produces a range of educational publications. |
| American Solar Energy Society | | Profiles national organization dedicated to advancing the use of solar energy for the benefit of U.S. citizens and the global environment. |
| Association for the Conservation of Energy | | Formed in 1981 by a number of major companies active within the energy conservation industry, in order to encourage a positive national awareness of the need for and benefits of energy conservation. |
| Ban the Bulb | | Blog advocates outlawing (or at least taxing) incandescent lights to reduce energy use. |
| Citizens Energy Corporation | | A non-profit company whose commercial subsidiaries support a wide array of social and charitable programs to help the poor and needy in the United States and abroad. |
| Clean Power Estimator | | Provides California residential electric customers a personalized estimate of the costs and benefits of investing in a photovoltaic (PV) solar or small wind electric generation system. |
| Climate Justice Initiative | | The new report "Greenhouse Gangsters vs. Climate Justice" launches CorpWatch's campaign on a platform that includes a just transition for workers and communities hardest hit by changes to energy systems. |
| COAL21 | | A program aimed at using advanced technologies to reduce or eliminate greenhouse gas emissions associated with the use of coal. Also explores coal's role as a primary source of hydrogen to power the hydrogen-based economy of the future. |
| CREST Discussion Groups | | Sustainable energy information, hosted mailing list and discussion group archives. Some list archives are searchable. |
| Electric Reliability Coordinating Council (ERCC) | | Energy industry coalition opposing the Environmental Protection Agency's (EPA) enforcement of New Source Review (NSR) for upgraded power plants. Includes white papers, media clips, and congressional testimony. |
| Energy Bulletin | | A clearinghouse of information concerning the peak in global energy such as oil and gas. |
| Energy Efficiency | | Provides information about the economic, environmental and health benefits of buying energy efficient products for the home. |
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