Groundwater, river levels and reservoirs are all at the lowest level for 21 years. Of course climate is a major factor but we should not ignore the impact buildings and roads have, together with intensive agriculture, In the last 100 years e have lost 90% of wetlands and 150000miles of hedgerows. The more impervious the surface, the faster the runoff and the lower the infiltration. this means more floods and more severe droughts. House will need to be built with separate sage and storm water systems, all houses will have to have water butts.
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