Resources for Alternative Energy
There are many different forms in which alternative energy is available.
One of these is solar power. Solar power is driven by photovoltaic cells، and these are progressively getting less expensive and more advanced. Solar energy power can be used for electricity، heating، and making hot water. Solar energy produces no pollution، as its input comes completely from the suns rays. However، much more work still needs to be done in order for us to economically harness the suns energy. For the time being، the resource is a little too conditional?storage batteries are needed to be used as backups in the evenings and on inclement days.
Wind energy has become the most-invested-in (by private investors and governments together) alternative energy source for the time being. The great arrays of triple-bladed windmills are being placed all over as ?wind farms?، to capture the motion of the wind and use its kinetic energy for conversion to mechanical or electrical energy. Of course، there is nothing new about the concept of a windmill for harnessing energy. Modern wind turbines are simply are more advanced variations on the old theme. Of course، the drawback to wind energy is...what do you do when there is a calm، still day? Needless to say، during these times the electric company kicks in for powering your home or office. Wind energy is not altogether independent.
Hydroelectric energy is available as a source of alternative energy، and it can generate a substantial amount of power. Simply put، hydroelectric energy uses the motion of water?its flow in response to gravity، which means downhill?to turn turbines which then generate electrical energy. Needless to say، water is ubiquitous
