Friday, 6 April 2012

Green Energy

The Postal Administrative  of  Korea Republic regularly every year issued the stamp set related to the environmental issues. On August 21, 2009, the Korea Post issued the postage stamp set depicted the green energy, such as solar thermal, usage of photo voltaic, wind power, and tidal power.
Green Energy is energy that can be extracted, generated, and/or consumed without any significant negative impact to the environment. The U.S. Environmental Protection Agency defines green power as electricity produced from solar, wind, geothermal, biogas, biomass, and low-impact small hydroelectric sources.
The last century has seen a rapidly growing global population and much more intensive use of resources, leading to greatly increased emissions of gases, such as carbon dioxide and methane, from the burning of fossil fuels (oil, gas and coal), and from agriculture, cement production and deforestation.
Green power is a subset of renewable energy and represents those renewable energy resources and technologies that provide the highest environmental benefit. The use of solar thermal for house electricity as depicted on the above stamp as one of green energy application.Customers often buy green power/energy for avoided environmental impacts and its greenhouse gas reduction benefits .

Evidence from the geological record is consistent with the physics that shows that adding large amounts of carbon dioxide to the atmosphere warms the world. This matter may lead to the effects such as higher sea levels; flooding of low-lying coasts; greatly changed patterns of rainfall; increased acidity of the oceans; and decreased oxygen levels in seawater.
The car and motor cycle are one of contributor carbon dioxide to the atmosphere if they use gasoline as source of energy. To eliminate or reduce the emission gas, the alternative energy should be used like photo-voltaic system that transform the solar energy to generate the power of car machine. The stamp shown the using of photo-voltaic on car. It is prototype of the future car model.
There is now widespread concern that the Earth’s climate will warm further, not only because of the lingering effects of the added carbon already in the system, but also because of further additions as human population continues to grow .
Some of the second-generation renewables, such as wind power, have high potential and have already realized relatively low production costs. The above stamp depicted the wind power with background picture of beautiful environment. At the end of 2008, worldwide wind farm capacity was 120,791 megawatts (MW), representing an increase of 28.8 percent during the year, and wind power produced some 1.3% of global electricity consumption.Wind power accounts for approximately 20% of electricity use in Denmark, 9% in Spain, and 7% in Germany.
Although not yet widely used, tidal power has potential for future electricity generation. Tides are more predictable than wind energy and solar power. Tidal power is extracted from the Earth's oceanic tides.Tidal power is the only technology that draws on energy inherent in the orbital characteristics of the Earth–Moon system, and to a lesser extent in the Earth–Sun system.A tidal generator converts the energy of tidal flows into electricity. Greater tidal variation and higher tidal current velocities can dramatically increase the potential of a site for tidal electricity generation. The above stamp depicted the tidal power station.

1 comment:

EddieEd said...

I am really thrilled at seeing these exiting and unique stamps. I have some of mine on my own website if you are into collecting!