Renewable energy Essay

This essay has a total of 380 words and 2 pages.

renewable energy

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

Biomass Energy: This is one of the oldest sources of energy known to man. Biomass energy
is energy from organic matter. The organic matter contains stored sunlight in the form of
chemical energy. Biomass fuel, which can be a liquid, solid, or gas, comes from plants,
residues from agriculture or forestry, and the organic component of municipal and
industrial wastes. Even the fumes from the landfills can be used. When the fuel is burned,
the energy is released. The use of this energy has potential to greatly reduce greenhouse
gas emissions. The waste generates about the same amount of carbon dioxide as fossil fuels
but as the plants grow (for biomass purposes), carbon dioxide will be removed from the
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