Apr 04 2011
Hydrogen Energy is created by passing Hydrogen through a membrane which separates the protons and electrons. In this process, the electrons are diverted to create electricity and H2O is given off as a byproduct. As a fuel source, Hydrogen is clean, with practically no pollutants released, it is efficient, can be up to 90% efficient if heat is harvested, and is safe, when kept in high pressure environments provides no risks.
Here is a quick video on how the fuel cell works http://video.nationalgeographic.com/video/player/environment/energy-environment/fuel-cells.html
Currently, scientists are researching how to harvest Hydrogen from algae. If this process is perfected, Hydrogen fuel cells would be a fully renewable energy source.