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Renewable Energy Sources
Transcript of Renewable Energy Sources
By: Zakariyya Al-Quran
What Are Renewable energy Sources
The most important concept of renewable energy is the fact that they never run out. This is the main difference between Renewable and Non-Renewable sources like fossil fuels. A great example of a renewable energy is solar energy. The sun will last for millions of more years (which is probably longer than humans will last). In one day the sun beams down 3 trillion MWh (Million watts) of energy which would power a 60 watt lightbulb for 1.2 million years (Fullman 52). This shows how renewable energy is available in huge amounts yet an average solar cell has only 25% efficiency. This means only 25% of the energy is transformed in to electricity. Though use of Renewable energy has actually doubled over the last few years and the cost is decreasing, renewable energy only accounts for only 17% of the worlds energy.
What are Non-Renewable Energy Sources
The most major difference is they run out unlike renewable energy. As of March 13, 2013 at 5:48:10 PM there was 1,249,504,621,331 barrels of oil left with 14,875 days to the end of it; 1,145,723,268,202 barrels of oil equivalent of gas left with 60,301 days to the end of gas; and 4,392,668,264,164 barrels of oil equivalent of coal left with 151,471 Days to the end of coal ("Worldometers" 1). Since this project is not about this crap but the exact opposite of it I will get over with the topic.
This is probably the most important reason on why everyone should use renewable energy (unless you want an end to the world! AHHH!!!). Global warming is well, what its name is: Global Warming. One of the main causes is the Green House Effect. When the clouds of a gas keeps in heat like a greenhouse, it is a greenhouse gas. Methane (the stuff your farts are made of) is a great example of a greenhouse gas. Transportation accounts for about 15% and farm animals 18% (animals fart a lot and there poo releases gasses too). Water Vapor is accountable for more than 80% of the greenhouse gasses and CO2 is under 1%. Global warming was discovered in the 1970s by Wallace Broecker
One thing is that when you burn fossil fuel you always get waste product of some sort. Fossil fuels tend to release a gas into the atmosphere and contribute to the greenhouse effect thus speeding up global warming. Since renewable energy produces little to no waste product it is fit to fuel the future because there are becoming more efficient and one day non-renewable energy will run out as shown earlier. Also, Renewable energy is easy to access unlike oil which is underground. Renewable energy is everywhere unlike fossil fuels scattered across the globe which usually causes wars trying to access them like in the middle east where 2/3 of the world's oils are contained there. Off shore drilling causes spills which also costs money to clean it all.
Solar Energy is the most abundant energy source on earth as said before but it only accounts for under 1% of the world's electricity . Solar energy is usually the power source of satellites. The first photovoltaic cell was built in 1954 ("Soar Energy" 1) and it wasn't until the past decades in which it has become popular mainly because of wars on gasoline. The main ways to harness solar energy is using solar collectors, photovoltaic cells, & concentrating solar towers. Photovoltaic is usually the one people refer to when speaking of solar power. Solar collectors use heat and a generator and concentrating is the same except for the concentration mirrors that reflect light on a tower. If all the energy was also harnessed in one day, it would power the entire planet for a year (Solar Power 13). Covering only 4% of the worlds deserts would be enough to power the world day and night(Fullman 158). That would be equivalent to the area the size of Spain almost. The two fact above show that solar power has a lot of potential for powering the world with electricity.
Biofuels are a very abundant source like all renewable energy sources. A great example of one is Ethanol which is found to up to 10% in our daily fuel. Some cars can run on 85% which means less gasoline and less carbon in the atmosphere. Biomass is the type where you burn it and use a generator to harness the fuel. Most of it comes from plants and oils. This may soon be the replacement for gasoline and solar or wind energy could replace electricity from burning fossil fuels.
Powered by the wind (duh), wind energy can work anywhere because there is always wind above us in the atmosphere going hundreds of times faster than the ground (). Wind Energy is the 2nd most used with millions of users worldwide which is only 1% of the world. People have been using wind for hundreds even thousands of years by ancient civilizations (like powering a boat). It is the fastest growing source as it is the easiest to use no matter what the circumstance is. One turbine powers about 300 homes. Wind is the most developed because it is the oldest.
Hydro meaning water is the most used type of renewable energy worldwide. Hydroelectric is movement of water being harnesses and tidal is the harnessing of the tidal rises and falls. Water powers 28.3 million people as of 2012 with about 45,000 large dams in use; half of them being in China. One of the only cons is that 40-80 million people have had to move due to the reservoir flooding their homes. The Three Gorges Dam built in China is the largest in the world. One of the most famous is the Hoover dam on the Colorado river. There are only 2 tidal wave power stations, one in France and one in Canada while there are plans for more and others are still in construction since it is sill the newest type.
How can they change the Earth and prevent Global Warming?
How Renewable Energy can Help
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