sentences:  Although Yorkshire Water invested £30 million in October 2015 to improve the odours emanating from the plant, local people in Preston and Hedon have employed solicitors to bring about legal action over the smell.Nippon Gohsei produce ethyl-vinyl alcohol copolymer (EVOH) on site.The EVOH line at Salt End is the largest in the world and is marketed under the brand name SOARNOL.