The situation didn't improve until the US began implementing a national acid-rain-prevention program in the 1980s and 1990s that required power plants to take measures to control their total sulfur emissions. But even with these measures, the ecological wounds already inflicted have yet to heal.
美加地區的酸雨危害持續多年，直至 1980 ~ 1990 年代美國實施全國性的酸雨防治計畫，要求所有電廠必須實施硫排放的「總量管制」後才漸有好轉，但已造成的生態創傷，至今依舊無法回復。