Renewables mean real energy independenceBeacon, N.Y.: When I read Voicer Tom Mielczarek’s recent question, it resonated with me because while it’s true that the U.S. is a major oil producer and exporter, the oil we produce is sweet crude oil. Domestic refineries are designed for heavier crude oil. We export the domestic oil and import the heavy oil, and therein lies the problem. Many of us are looking at the cost per gallon with increasing horror, worried about how much higher it will go. We feel helpless, even though the solution that ends this is right above us, collected by...