It is exceedingly difficult to quantify pollution that comes from beyond one's borders. The Canadian government-the self-designated victim-repeatedly sought compensation from the US, but the two countries were never able to arrive at an agreement. Neither has any European nation been successful in its efforts to seek recompense, and acid rain remains a very difficult ecological issue in transnational negotiations.
由於這種由他地移入的污染極難量化，即使自居「受害者」的加拿大政府，多年來屢向美國爭取賠償，但兩國始終無法取得共識；歐洲諸國也尚無求償成功的案例，酸雨也成為跨國談判最棘手的生態議題之一。