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Dte energy - dte-homepage, Energy energy technology provider residential commercial electric natural gas.. http://www.dteenergy.com/ National renewable energy laboratory (nrel) home page, The federal laboratory dedicated research, development, commercialization, deployment renewable energy energy efficiency technologies.. http://www.nrel.gov/ The american solar energy society, leading renewable, Established 1954, nonprofit american solar energy society (ases) nation’ leading association solar professionals & advocates.. http://www.ases.org/