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Pros and cons of renewable energy - wind power, solar and biomass.

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Advantages and disadvantages of wind power A wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity. Advantages * The wind is free and with modern technology, it can be captured efficiently. * Once the wind turbine is built, the energy it produces does not cause green house gases or other pollutants. * Although wind turbines can be very tall each takes up only a small plot of land. This means that the land below can still be used. This is especially the case in agricultural areas as farming can still continue. * Many people find wind farms an interesting feature of the landscape. * Remote areas that are not connected to the electricity power grid can use wind turbines to produce their own supply. ...read more.


* When wind turbines are being manufactured some pollution is produced. Therefore wind power does produce some pollution. * Large wind farms are needed to provide entire communities with enough electricity. For example, the largest single turbine available today can only provide enough electricity for 475 homes, when running at full capacity. This is clearly not enough Solar power advantages and disadvantages Solar power is probably the cleanest, most viable form of renewable energy available and it can be used in several forms to help power your house. Many gardens now use solar lights or solar garden water features. Advantages * Solar energy is free although there is a cost in the building of 'collectors' and other equipment required to convert solar energy into electricity or hot water. * Solar energy does not cause pollution. However, solar collectors and other associated equipment / machines are manufactured in factories that in turn cause some pollution. ...read more.


However, the batteries are large and heavy and need storage space. They also need replacing from time to time. Advantages and disadvantages of biomass Biomass fuels derive from timber, agriculture and food processing wastes or from fuel crops that are specifically grown or reserved for electrical uses. Biomass fuel can also include sewage sludge and animal manure. Some biomass fuels are derived from trees. Because trees are abundant, these fuels are considered renewable. Advantages * Theoretically a renewable fuel source. * When direct combustion of plants and trees are not used to generate energy , there is barely any environmental impact. * Alcohols and other fuels produced by biomass are efficient, viable, and relatively clean-burning * Available throughout the world Disadvantages * Could contribute a great deal to global warming and particulate pollution if directly burned * Still an expensive source, both in terms of producing the biomass and converting it to alcohols * On a small scale there is most likely a loss of energy, because energy must be put in to grow the plant mass. ?? ?? ?? ?? ...read more.

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