The Various Renewable and Non- Renewable Energy Sources

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Electricity is a vital service a majority of the world uses on a daily basis. If it were to be depleted, many of us would not know what to do. Thankfully, however, not all sources of energy are non-renewable (although the renewable sources do have their downsides). Some sources are more prevalent in certain areas, while they may be extremely scarce in others; on the contrary, some sources are found all over the world, but only in trace amounts. The world around us uses many different types of electrical energy and a variety of sources from which that energy may be extracted. Solar power, biomass, wind, oil, gas and coal energy all have their positive and negative effects on the environment, animals and human beings. Without them, the high-tech world we live in would, so to speak, “power down”. Solar power, to begin with, is simply the conversion of heat and light from the Sun into usable electrical energy. For most, the things that come to mind when solar power is mentioned are solar panels. Solar panels mainly consist of photovoltaic (or PV) cells. In order for a PV cell to work, a semiconductor (usually made of silicon) must be present. This semiconductor will absorb a portion of the light energy given off by the cell, which will set electrons loose. The electrons then flow (the flow being directed by electric fields) in a current that can be directed through something as complex as the parallel circuits of a house or something as simple as the bulb in a garden light. An important thing to remember, though, with lights in mind, is that they only need to be functional when the Sun is not shining. Thus, the energy needs to be stored and released when necessary – for example, a solar-powered light only needs to be luminous at... ... middle of paper ... ...TCE&Params=a1ARTA0000758> ∑ Mcconnell, Rita. “The downside of solar power”. Helium. ∑ Wade, Will. “Unexpected Downside of Wind Power”. Wired. ∑ Author unknown. “Wind Energy”. Re-Energy.ca. ∑ Gugie, John. “How Does a Generator Work?”. eHow.com. ∑ Author unknown. “The Energy Story – Chapter 8: Fossil Fuels – Coal, Oil and Natural Gas”. Energy Quest. ∑ Author unknown. “Sulfur, Chemical Element – Overview, Discovery and naming, Physical properties, Chemical properties, Occurrence in nature, Isotopes”. Chemistry Explained.

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