plentiful supply in some location, excration provides jobs and existing technology: the fuel is availabe

carbon dioxide and toxic gases when burnt, exctration causes damage to local area and limited supply: prices will rise as the supplistes get smaller.

building of dams impact the natural flow of water. villages and ecosystems may be destroyed when dams and reservoirs are built

does not produce carbon dioxide and water can be reused for other purposes

does not produce carbon dioxide and tidal movements not dependent on weather conditions

limited to especific coastal areas and impacts on the tourist industry and local fishers

limited to specific areas and currently not very efficient.

does not produce carbon dioxide and is a renewable source of power

does not produce carbon dioxide, sunlight is not a limited recources

only efficient under certain weather conditions and generations only occurs in daylight hours

not all location are suitable, visual impact and uses a large area

does not produce carbon dioxide and uses and renewable source