sentences:  Afon Lwyd
  
  The Afon Lwyd () is a long river in south-east Wales which flows from its source north of Blaenavon, through Abersychan, Pontnewynydd, Pontypool, Llanfrechfa and Cwmbran before flowing into the River Usk at Caerleon, which subsequently flows into the Bristol Channel in Newport.The river was severely affected by pollution from industry and mine discharge, and fly tipping, but during the 1980s efforts were made to improve the water quality of river and improve fish stocks.