Acid Rain Mr. D. E. Thomas asked the Secretary of State for Wales what action he intends to take to reduce the amount of ecological damage caused by acid rain in Wales. Mr. Wyn Roberts There is no reliable evidence to link ecological damage in Wales with acid rain, but research is being carried out to assess the relative contributions made by acidic rainfall, soil and bedrock types, afforestation and land practices, to the known acidity of some Welsh lakes and streams.