Fuel Cell: Fuel cells have been known to science for 150 years and have become the subject of intense research since World War II. A fuel cell generates electricity by producing a chemical reaction. It consists of two electrodes (cathode and anode), which is also where the reaction occurs. Hydrogen is the basic fuel cell, but all fuel cells also require oxygen, and both are supplied from external reservoirs. Most of the hydrogen and oxygen used, combine to form a harmless byproduct, namely water. Therefore, fuel cells generate electricity with very little pollution. It is the purpose of the fuel cells to produce an electrical current that can be directed outside the cell to do work, such as powering light bulbs or an electric motor. There are five different fuel cells, solid oxide, alkali, proton exchange membrane (40-50% efficiency), phosphoric acid, and molten carbonate.
Biomass Energy: This is one of the oldest sources of energy known to man. Biomass energy i...