energy is an umbrella term that refers to any
source of usable energy intended to replace fuel sources without the
undesired consequences of the replaced fuels. Typically, official uses
of the term, such as qualification for governmental incentives, exclude
fossil fuels and nuclear energy whose undesired consequences are high
carbon dioxide emissions, the major contributing factor of global
warming according to the Intergovernmental Panel on Climate Change, and
difficulties of radioactive waste disposal.
Over the years, the nature of what was regarded alternative energy sources has changed considerably, and today because of the variety of energy choices and differing goals of their advocates, defining some energy types as "alternative" is highly controversial.
The term "alternative" presupposes a set of undesirable energy technologies against which "alternative energies" are opposed. As such, the list of energy technologies excluded is an indicator of what problems that the alternative technologies are intended to address. Controversies regarding dominant forms of energy and their alternatives have a long history.
Photovoltaic cells - those black squares an array of which comprises a solar panel - are getting more efficient, and gradually less expensive, all the time, thanks to ever-better designs which all them to focus the gathered sunlight on a more and more concentrated point.
The size of the cells is decreasing as their efficiency rises, meaning that each cell becomes cheaper to produce and at once more productive.
As far as the aforementioned cost, the price of producing solar-generated energy per watt hour has come down to $4.00 at the time of this writing. Just 17 years ago, it was nearly double that cost.
Solar powered electricity generation is certainly good for the environment, as this alternative form of producing energy gives off absolutely zero emissions into the atmosphere and is merely utilizing one of the most naturally occurring of all things as its driver.
Solar collection cells are becoming slowly but surely ever more practical for placing upon the rooftops of people's homes, and they are not a difficult system to use for heating one's home, creating hot water, or producing electricity.
In the case of using the photovoltaic cells for hot water generation, the system works by having the water encased in the cells, where it is heated and then sent through your pipes.
Photovoltaic cells are becoming increasingly better at collecting sufficient radiation from the sun even on overcast or stormy days.
One company in particular, Uni-Solar, has developed solar collection arrays for the home that work well on inclement days, by way of a technologically more advanced system that stores more energy at one time during sunlit days than previous or other arrays.
There is actually another solar power system available for use called the PV System. The PV System is connected to the nearest electrical grid; whenever there is an excess of solar energy being collected at a particular home, it is transferred to the grid for shared use and as a means of lowering the grid's dependence on the hydroelectrically-driven electricity production.
Being connected to the PV System can keep your costs down as compared to full-fledged solar energy, while at once reducing pollution and taking pressure off the grid system. Some areas are designing centralized solar collection arrays for small towns or suburban communities.
Some big-name corporations have made it clear that they are also getting into the act of using solar power (a further indication that solar generated energy is becoming an economically viable alternative energy source).
Google is putting in a 1.6 megawatt solar power generation plant on the roof of its corporate headquarters, while Wal Mart wants to put in an enormous 100 megawatt system of its own.
Nations such as Japan, Germany, the United States, and Switzerland have been furthering the cause of solar energy production by providing government subsidies or by giving tax breaks to companies and individuals who agree to utilize solar power for generating their heat or electrical power.
As technology advances and a greater storage of solar collection materials is made available, more and more private investors will see the value of investing in this “green” technology and further its implementation much more.
More ArticlesWhat Is Alternative Energy
... lies in the dumps and from some air pollutants. This gas is used in fuel cells and can be used in standard gasoline generators. Ethanol is a gasoline substitute and is created from such things as wheat, sugarcane, grapes, strawberries, corn, and even wood chips and wood cellulose. There is controversy ...
... war in the new, post-Cold War world of the 21st century. One thing that the military leaders stress is the desire for the forces deployed in the theater to be able to be more energy-independent. Currently the US military has policies and procedures in place to interact with allies or sympathetic local ...
... diversify their business to make up for revenues lost through household energy microgeneration. She is referring to the conclusions by a group of UK analysts, herself included among them, who call themselves Carbon Free. Carbon Free has been studying the ever-growing trend toward alternative energy-using ...
... make them ever more efficient. In addition, people are moving away from the traditional electric grids and the fossil fuels for personal reasons including desire for greater independence, the desire to live remotely or rurally without having to go primitive , political concerns such as fears of terrorist ...
... that the number of renewable energy funds and the amount of money flowing into these funds is increasing, according to chief executive of UK alternative elecricity supplier Good Energy Juliet Davenport. The renewable generation market is at an important stage in its development; it needs the continued ...
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