In the young 21st Century, two realizations are rudimentary; beginning on the world’s population: we are hopelessly dependent on petroleum, which is only going to get more costly; and global warming, caused primarily by our burning associated with fossil fuels, will impact world in ways that we’re just beginning to grasp. Stepping in to fight both of these massive problems are the rapidly evolving systems that harness renewable energy. We will see how air, water, planet, and fire are transformed into clean, reli
List Price: $ fourteen. 98
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