Western Mail: CLIMATE change is hampering the long-term recovery of Welsh rivers from the effects of acid rain, a team of scientists claim today. Professor Steve Ormerod and Dr Isabelle Durance of the School of Bio- sciences at Cardiff University, undertook a 25-year study around Llyn Brianne near Llandovery. They found that an increase in wet weather is offsetting improvements in the quality of water in rivers and streams. The research, carried out in 14 streams, assessed the number …