http://www.refrigerationschool.com/articles/hvacr-and-the-green-jobs.html - Online Green Energy Courses - Sustainable energy technology that increases heating and air efficiency is considered a priority for twenty-first century growth so trained green HVACR techs are in demand around the world. The ability to identify, isolate, and incorporate natural resources to fulfil clean energy needs is an asset that will continue to grow as the world becomes greener
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