6. Bibliography

Bonsor K. (2001, 6 September) “How Hydropower plants work”. Retrieved from:

Kalinowski R. (2007, 6 September) “How to paint wood to a high gloss paint” Retrieved from:http://www.ehow.com/how_7707838_paint-wood-high-gloss.html

Layton J. (2006,9 August) “How wind power works”. Retrieved from:

Liwanag (2012) “How to build a solar light bulb” Retrieved from:

Mark K. (2011, 22 November) "People's showering habits revealed in survey" Retrieved from: http://www.bbc.com/news/science-environment-15836433

Toothman J. & Aldous S. (2000,1 April) “How solar cells work”. Retrieved from:

Tracy M. (2014, 28 January) "How Often Do You Really Need To Shower" Retrieved from: http://jezebel.com/how-often-do-you-really-need-to-shower-1510228527

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