By TheStreet Staff What Is Hydrogen?Hydrogen is touted as an alternative and clean energy source that can power electric vehicles, releasing nothing but water vapor and heat into the atmosphere. The electrolysis process of separating water into two atoms of hydrogen and one atom of oxygen, though, is power intensive—it requires large amounts of electricity. Hydrogen is becoming popular among alternative energy sources, but production in large quantities is limited. It faces competition—at the consumer and commercial levels—from lithium-based batteries, which have become the dominant source in …