There are two types of sources of energy in the world: renewable energy sources and non-renewable energy sources. Renewable energy sources include solar energy, biomass energy, wind energy, tidal energy, hydro energy, and geothermal energy. Non-renewable energy sources include oil, coal, natural gas, and nuclear energy. Renewable energy sources are generated directly from nature, like the sun, rain, wind, tides, and it is possible to generate it over and over whenever it is needed. Renewable energy sources are abundant and are definitely the cleanest energy sources in Earth. For instance, it is possible to utilize the energy we get from the sun in order to generate electricity. Geothermal, wind, tides,and biomass energy from plants can also be used in different forms. Most energy that is used in the world today is generated from non-renewable energy sources. These energy sources can be re-generated over a short period of time. Natural gas and oil are derived from anicent plant or animal remains or fossils. These remains are what we have been left with after millions of years of fluctuation in pressure and temperature.
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The 8 leading sources of renewable energy that will supply half the world’s power by 2050

The following is a list of sources of renewable energy that are especially promising in two aspects: competitiveness and abatement potential.

1.Onshore Wind
This is one of the main sources of renewable energy power, as wind technology is the renewable energy sector that is the most mature. 21GW were built in 2007 in the onshore wind industry, which made the installed capacity exceed 100GW. In Denmark, Spain, and Germany electricity generation from wind technology now comprise up to 19 percent of the nations needs (in Denmark) throughout the duration of the year.

2.Offshore Wind
There is enormous potential in offshore wind technology, which makes it a powerful source of renewable energy. Since the winds are more predictable, the space for turbines is almost unlimited. It may be easier to obtain planning permission than for onshore wind, and it is possible to construct farms at scales that would be impossible on land. In addition, if deep waters can be mastered, the space available becomes virtually unlimited.

3.Solar Photovoltaic Power
In the past four years Photovoltaic (PV) technology has made noticeable progress with reducing crystalline silicon costs, which is its main component. It has also made very rapid strides in commercializing thin film technology. In the last two years its investment volume increased to $50 billion.

4.Solar Thermal Electricity Generation
PV may be a perfect source of renewable energy for smaller-size projects, which are mostly integrated into buildings, but big solar plants in deserts worldwide seem to be choosing Solar Thermal Electricity Generation (STEG). This system concentrates the sun’s heat and generates steam that may be utilized in efficient conventional turbines.
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Kempton is one of the beautiful locations in Pennsylvania that makes you think of home. Just outside Allentown, PA, the community is known for their rolling hills and friendly atmosphere. It is of no surprise that they take incredible pride in the high level of ecological interests; Kempton Pennsylvania has taken this to the next level. It I here, in September, that you will see Kempton hosting the Pennsylvania Renewable Energy and Sustainable Living Festival. It seems that Kempton is setting the bar pretty high and is now an example of excellence for other states to follow.
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We are in a current global situation where all industries, governments and scientific laboratories are seeking forms of renewable energy. As we make our attempt at removing ourselves from the dangers of fossil fuel dependency, we need to research what forms of renewable energy have the greatest potential.
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How does ocean wave energy conversion work? Sea wave energy is caught and then changed into the electrical type using a number of different devices and processes. One of the most widely used is the Pelamis Wave Energy Converter, and this ocean wave energy conversion method is very effective. The Pelamis Wave Energy Converter is the first device of this kind to be used commercially in a wave farm, and it has proven to be a leading contender with these devices. They can include buoys, mechanical devices with floating arms, and others. The basic idea is that the physical energy of the waves is converted into electricity, which can then be stored and used for power. The buoy or arms are normally floating on or under the water surface. As the wave device goes up and down with the wave motion, it causes a hydraulic pump to turn the generator, and this produces electricity.
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What is a chip fat bus and why has it been making headlines? This bus is the invention of Andy Pag, an environmentalist who wants to make a difference. The bus uses renewable energy sources and alternative energy sources because it is run on discarded cooking oil, that which is commonly used to create potato chips. This bus represents sustainable energy, and that is what Andy Pag is trying to prove.
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Alternative energy at the University of Virginia is big news. This college has made a big investment in sustainable energy on campus. Four teams of students at the school have been chosen to receive seed grants worth $30,000 for projects relating to alternative energy sources and renewable energy sources. The grants were given to increase research in ways to use alternative energy at the University of Virginia.
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Landfill biogas is one of the renewable energy sources, and this gas is a sustainable energy source as well. Natural gas and landfill biogas have a lot in common, and landfills can be alternative energy sources which are eco friendly and efficient at the same time. When organic waste, such as food scraps, paper, and other garbage are put into a landfill, the material starts to break down and decompose. As organic matter decomposes, it releases methane gas, and this is present in natural gas that is used to create electricity and heat homes. This gas does not have any smell or color, so it is impossible to detect without special equipment. Landfills may accumulate the gases released from the decaying organic material, and it is explosive and hazardous if not released.
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What is the Missouri renewable energy initiative? This was a ballot initiative in the state of Missouri for the November 2008 election, to make the switch to renewable energy sources. Started by the Missourians for Cleaner Cheaper Energy, the Missouri renewable energy initiative involves investing in solar power and other renewable energy sources. The ballot initiative passed by two thirds of the votes, showing that the residents of the state of Missouri are ready to do the right thing for the environment. This initiative amends the law in the state, so that electric utility companies which are owned by investors must either purchase or generate a specific amount of electricity from renewable power sources. The percentage required increases over time, and the consumer rate increases are capped at one percent.
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Green power at West Bank has made news headlines, for a number of different reasons. The first is that renewable energy sources and sustainable energy were used, the second is that the project was undertaken by Israelis to benefit a village of Palestinians, and the third reason is the impact that this project has had on the lives of the villagers. Alternative energy sources include solar and wind power, and this may be just the first step in the right direction. Green power at West Bank villages which have no electricity or power was undertaken by Comet-ME, which is a peace activist group which includes Israeli physicists, scientists, and environmental activists. The group saw that the village of Susya, West Bank did not have any power at all, and this is one of the poorest villages in the region.
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