REFERENCES
1. Twiddle, J., et al 2006. Renewable Energy
Resources, pp 7-8
2. Boyle, G., 1996.
Renewable Energy – Power for a
Sustainable Future, pp 268-271
3. Steisdal, H., 1999. Components
and Operation. The Wind Turbine,
1(4), pp 13
4. The American Wind Energy Association. Basic Aerodynamic
Operating Principles of Wind Turbines [online]. Available from: http://www.awea.org/faq/basicop.html.
[Accessed 17 November 2009]
5. Edwards, R., 2008. Renewable Energy: Anywhere
the Wind Blows [online]. New Scientist. Available
from: http://www.newscientist.com/article/mg20026771.700-renewable-energy-anywhere-the-wind-blows.html.
[Accessed 17 November 2009]
6. Twiddle, J., et al 2006. Renewable Energy Resources,
pp 471
7.
8. Watson, S., 2009.
How Geothermal Energy Works [online].
HowStuffWorks.com. Available from: http://science.howstuffworks.com/geothermal-energy1.htm.
[Accessed 18 November 2009]
9. Boyle, G., 1996.
Renewable Energy – Power for a
Sustainable Future, pp 375-376
10. Office of Geothermal Technologies. 1998. Direct Use
of Geothermal Energy [online].
11. DiPippo, R., 2005. Geothermal Power Plants: Principles, Applications and Case Studies,
pp 142
12. DiPippo, R., 2005. Geothermal Power Plants: Principles, Applications and Case Studies,
pp 88
13. DiPippo, R., 2005. Geothermal Power Plants: Principles, Applications and Case Studies,
pp 158
14. Renewable Energy
15. HowStuffWorks.com. 2008. Tide – The Causes of Tides [online]. Available from: http://geography.howstuffworks.com/terms-and-associations/tide1.htm.
[Accessed 18 November 2009]
16. BBC. 2008.
Severn Barrage Details Unveiled
[online]. Available from: http://news.bbc.co.uk/1/hi/england/7202413.stm.
[Accessed 18 November 2009]
17. Gray, L., 2009.
18. South West Councils. 2006. The Potential
Impacts of a Severn Barrage on the Wildlife of the