lunes, 18 de octubre de 2010
Summary#1*Energy Resources*
Many homes, shools, and business get heat by burning oil or natural gas. Some older buildings still burn coal for heat. Some homes burn wood for heat. The heat in many other homes and businesses comes from electricity. Many common devices, such as lights, computers, radios, TVs, and washers. Some small devices such as flashlights and portable CD players get their electricity from batteries. That electricity comes from a power planet. The power plant makes electricity by using energy from burning fuels such as coal, oil, and natural gas. It takes a lot of energy to move a car, bus, or train. Public an private transportation is one of the greatest uses of energy in today´s world. Heat from burning fossils fuels can bu used directly to heat homes, schools, businesses, and factories. The heat can also bu used to generate electricity. All fuels have advantages and disadvantages. The advantage of using fossil fuels is that they contain a lot of energy. However, fossil fuels take millions of years to form. Burning a fossil fuel also gives off smoke, gases, and other by-products. These pollute the envirotment. Fossil fuel are the remains of once-living things. Natural gaso or oil formed from the remains of tiny ocean plants and animals. These sea creatures died and fell to the bottom of the ocean. There their bodies were buried by layers of sand and mud. One day is to use alternative energy sources such as water, wind, and solar energy. Every watt of electricity we get from a solar cell is one less watt we have to get by burning oil or coal.
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