By Hans De Keulenaer / Published on Wed, 2008-11-05 12:34
Will energy efficiency always fail to win its case through the consultation process?
Jacky Pett, Tyndall Centre for Climate Change Research
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By Bruno De Wachter / Published on Wed, 2006-12-20 03:00
Balancing local and global arguments
The debate over the construction of a tidal barrage in the Severn Estuary between England and Wales is a textbook example on how difficult it can sometimes be to balance local and global environmental issues.
The Severn Estuary, located between the English city of Bristol and the Welsh city of Cardiff, has the second largest tidal range in the world — about 15 metres. It is exceeded only by the Bay of Fundy in Canada. This makes it the ideal place to build a tidal barrage for generating electricity. A 16 kilometre barrier between Brean Down (England) and Lavernock Point (Wales) could have a massive capacity of 8,640 MW during flow, or 2,000 MW on average. This is 5% of the UK’s projected energy needs by 2020.
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