1.Solar : e. Energy from sunlight is captured in solar panels and converted into electricity. Advantages: potentially infinite energy supply. Disadvantages : manufacture and implementation of solar panels can be costly.
2. Wind : a. wind turbines (modern windmills) turn wind energy into electricity. Advantages : potentially infinite energy supply. Disadvantages : manufacture and implementation of wind farms can be costly.
3.Tidal : f. the movement of sea water in and out drives turbines. Advantages : a lot of energy is generated this way. Disadvantages : construction can be costly. Maybe opposed by local or enviromental groups.
4.Geothermal : b. it is possible to use heat from under the earth´s surface in volcanic regions. Steam can be used for heating or to power turbines creating electricity. Advantages : potentially infinite energy suplly. It is used successfully in some countries, such as New Zeland. Disadvantages : can be expensive to set up. Only works in areas of volcanic activity.
5.Hydro-electric power (HEP) : c. energy hamesed from the movement of water through rivers, lakes and dams. Advantages : creates water reserves as well as energy supllies. Disadvantages : costly to build. They can cause the flooding of surrounding communities and landscapes. Dams have major acological impacts.
6.Biomasa : d. an organic material which can be burnt to provide energy (heat or electricity). Advantages : it is a cheap source of energy. Disadvantages : when burnt, it gives off atmospheric pollutants, including greenhouse gases.
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