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 Renewable energy comes from sources that are essentially inexhaustible. They include the sun, the wind, flowing water and the heat of the Earth; or replaceable fuels such as plants. Renewable energy can be used for all of the above categories. Why is renewable energy important? Until the industrial revolution, renewable energy sources were virtually the only forms of energy used by humans - they burned biomass (wood), made use of windmills, watermills and sailing ships. But during the last 150 years, modern civilization has become increasingly reliant on fossil fuels: oil, coal and natural gas. Fossil fuels form so slowly in comparison with the rate of energy use that they are considered finite or limited resources. In addition, the burning of fossil fuels produces greenhouse gases and other pollutants. Greenhouse gases are believed to be responsible for trapping heat in the Earth's atmosphere, heat that would normally be radiated back into space. This effect is being linked to changes in the Earth's climate.  Renewable energy generally produces few or no greenhouse gases. The exception is biomass; however the carbon dioxide emitted is balanced by the amount of carbon absorbed from the atmosphere while the plant is growing. If biomass is being used sustainably, there are no net carbon emissions over the time frame of a cycle of biomass production. Biomass is considered to be carbon neutral.Using renewable energy can provide many benefits, including:
What are the different types of renewable energy? Renewable energy should not be viewed as a single energy source or technology; rather a range of energy types with differing costs and at different stages of development of harnessing the primary energy. The most common types of renewable energy are:
How can I use renewable energy?  It doesn't necessarily mean that you have to change your lifestyle or your appliances. Nor is it more, or less, unreliable than conventional energy sources. There are a number of ways you can use renewable energy at home. They range from making some minor behavioural changes to installing your own renewable energy system.
Where can I get more information? The Mid and South West Wales Energy Advice Centre (EEAC) is participating in a renewable energy advice pilot scheme and can provide options for your home or community group. If you are located within this area call: 01239 821903 or visit www.ecocentre.org.uk Further information on renewable energy, case studies, funding sources etc: www.est.org.uk/renewables |
| Last Updated on Tuesday, 15 September 2009 10:32 |
Energy plays an indispensable role in modern society. We all depend on a constant and reliable supply of energy - for our homes, businesses and for transport. But have you ever thought about the source of the energy you use?