A Barrage too far? Green energy will cost too much by Mark Horton The Government has shortlisted 5 schemes (from an original list of 10) for a tidal barrage across the river Severn between south Wales and England. The most ambitious is a 10 mile concrete and rock wall extending from Brean Down in Somerset to Cardiff. Other alternatives include two much smaller barrages close to the line of the Severn Bridges, and two tidal lagoons on the Welsh and…

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