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The Energy!

Energy efficiency: is the reduction of energy consumption while maintaining the same energy services without diminishing our quality of life by protecting the environment, ensuring supply and promoting sustainable in their use ..
Energy efficiency is the smart energy consumption.energy sources are finite and so we have to care for future use.

How to save energy?http://saveenergy.about.com/od/energyefficientappliances/tp/SaveNow.htmiyuy(In this web thera are 10 Tips for Saving Energy Right Now).
Saving energy is important for the economy but also to collaborate with the environment. It is in our hands to save energy with very easy acts to perform in our day to day, for example:save water in the shower, use energy saving light bulbs, buy appliances that have theletter A, not to use means of transport if not needed, close the taps and turn off lights when not in use etc...

Pollution is the presence or addition to the environment or toxic substances that are harmful to humans or ecosystems (living). There are different types of pollution:water pollution, air, atmosphere, soil, noise, among other.Some of the most serious environmental changes related to thephenomena of radioactive pollution are exhaust, smog, greenhouse effect, acid rain, destruction of the ozone layer, eutrophication of water or oil spills.Pollution can also be the consequence of a natural disaster. For example, hurricanes.Our health is deteriorated as result of emission of carbon dioxide from the vehicles, and sulfer dioxide and nitroxide from industries. These gases are oftentrapped in the city, creating smog that could worsen asthma, impair lung function, and even cause death. Increasing pollutants such as carbon dioxide and chlorofluorocarbon can cause global warming and depletion in the ozone layer.It is not just we are affected by pollution; animals and plants are also affected by pollution. Animals and plants would become dehydrated from the extreme heat. Ice wouldmelt more quickly, destructing the habitat of polar bears. Fish and other marine animals would die from oil leakage and the presence of untreated sewage in the sea.However, we can all reduce pollution by changing our lifestyle. Instead of driving cars, we can take public transits, ride bikes, and walk more frequently. We should try to reduce, recycle, and reuse things as much as we can. Sincefactories are the number one cause of acid rain, they should reduce their amount of emissions as much as possible. For instance, they could install rubber scrappers on their chimneys to trap sulfer dioxide and nitroxide from escaping to the atmosphere.Furthermore, governments need to raise public awareness on pollution control through education. Teachers have to address to all students on how torestrict pollution.
http://www.youtube.com/watch?v=thuViaxRd_w&feature=related (one video you need to see,remenber the earth is our home all of us need to be careful with it,if we don't care it all of we have right now will disapear.)

Renewable energy: is energy which comes from natural resources. Only about 16% of global final energy consumption comes from renewables. there are differenttypes of renewable energy such as wind power, hydropower, solar energy, biomass, biofuel & geothermal energy. Coal or gas are not sustainable or renewable: once they are gone, there is none left. More and more people are wanting to use clean, renewable energy. It is sometimes called 'Green Power'.

wind power:is the conversion of wind energy into a useful form of energy, such as using windturbines to make electricity ,Wind power, as an alternative to fossil fuels is plentiful, renewable widely distributed, clean, and produces no greenhouse gas emissions during operation, and the cost per unit of energy produced is similar to the cost for new coal and natural gas installations.

Hydropower: Hydro power is generated by using electricity generators to extract energy from moving...