Green energy is a renewable energy that comes from natural resources especially plants, called biofuel. Green energy is a main solution from global warming issue. It has discovered to make a difference in world energy that makes a good influence for our earth. Therefore, green energy is the one of our hope to make an alternative energy future thatís powered purely by renewable and also save for the earth. So, it is important for human future to develop green energy.
Many countries have developed biofuel and used them as an alternative energy. Kenya and Nepal consume biofuel until 85%. It proved that biofuel definitely save and can be another alternative energy. US also consume biofuel about 3,6%. Nowadays, Europe countries targeted to consume biofuel until 8,3% in 2010.
Biofuel has many different forms. Some of them are harvest product, such as willow coppie and miscanthus. This plant can grow faster and can be a new environment for animals. Dried rice stalks, wood, hull of rice, fiber of coconut, houseís waste, and also animalís dung can be main material for producing biofuel.
In our country, Indonesia has high potential of green energy. But, Indonesia only consume 20% of renewable energy.
B. Three Different Methods of Using Biofuel
There are three methods to use biofuel:
The first method is direct combustion for using thermal potential. This method has been using since a long time ago with traditional way. But now, it has developed using biofuel to substitute coal. Therefore, it will not produce carbon dioxide from the burning process.
The second method is using biogas. Nowadays, many countries has developed and used biogas from fermentation of plant or animalís dung. The fermentation process will produce biogas, such as methane, carbon dioxide, and hydrogen that directly used to burning. This method called as digester biogas.
The last method is converting become liquid fuel. The most common liquid and biofuel are bioethanol and biodiesel. This two kind of fuel has used by many countries and the most popular alternative for a green lifestyle. Bioethanol is an alcohol produced from fermentation process. Plants that used to make bioethanol are plants which have starch, such as cassava, corn seed, sorgum seed, oat, sago, and potatoes; plants which contain sugar, such as molasses, sugar cane, and coconut; and plants which have cellulose. Bioethanol commonly use to decrease carbon monoxide emission from vehicle. Biodiesel is made from oil from plants, animalís fat, or algae. It used as additive substance to decrease gas emission.
I have no doubt that we will be successful in harnessing the sun's energy. If sunbeams were weapons of war, we would have had solar energy centuries ago.
– Sir George Porter, quoted in The Observer, 26 August 1973
The use of solar energy has not been opened up because the oil industry does not own the sun.
– Ralph Nader, quoted in Linda Botts, ed., Loose Talk, 1980
Thank God men cannot fly, and lay waste the sky as well as the earth.
– Henry David Thoreau
There's so much pollution in the air now that if it weren't for our lungs there'd be no place to put it all.
– Robert Orben
There is a sufficiency in the world for man's need but not for man's greed.
– Mohandas K. Gandhi
Modern technology Owes ecology An apology.
– Alan M. Eddison
Don't blow it - good planets are hard to find.
– Quoted in Time
Nature provides a free lunch, but only if we control our appetites.
– William Ruckelshaus, Business Week, 18 June 1990
I think the environment should be put in the category of our national security. Defense of our resources is just as important as defense abroad. Otherwise what is there to defend?
– Robert Redford, Yosemite National Park dedication, 1985
Your grandchildren will likely find it incredible - or even sinful - that you burned up a gallon of gasoline to fetch a pack of cigarettes!
– Paul MacCready, Jr.
We do not inherit the earth from our ancestors, we borrow it from our children.
– Native American Proverb
When we heal the earth, we heal ourselves.
– David Orr
How long can men thrive between walls of brick, walking on asphalt pavements, breathing the fumes of coal and of oil, growing, working, dying, with hardly a thought of wind, and sky, and fields of grain, seeing only machine-made beauty, the mineral-like quality of life?
– Charles A. Lindbergh, Reader's Digest, November 1939
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
– Richard P. Feynman
Living in the midst of abundance we have the greatest difficulty in seeing that the supply of natural wealth is limited and that the constant increase of population is destined to reduce the American standard of living unless we deal more sanely with our resources.