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 .