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e) In 2013, plans to construct a 34 billion pounds barrage across the Severn estuary were rejected after concerns were raised about its effect on local ecosystems.

c) And with the second largest tidal range in the world, British marine energy could play an important role in this shift.

b) The government has promised to help counter this global trend by reducing UK carbon emissions by 80 percent from 1990 levels by 2050.

a) By 2100, human-induced climate change threatens to raise temperatures by 2-4℃ and push up tide-lines by 4-6m.

d) But harnessing the power of the tides is not without consequence.