The debate about flood defences is loaded and one that has been going on for years if not centuries. The above map from the link provided by Pen above is fascinating, showing villages lost since Roman times. Nevertheless, my view is that we must cut emissions to halt climate catastrophe and reduce the rate of rise in the sea level. I saw a lot of off-shore and land based wind farms, plus lots of large electrical stations to receive the wind power, when driving from Spurn to Withernsea. The East Coast is doing a lot for us in terms of renewable energy.