一直到1987年5月《莱茵河行动纲领》出台，沿岸各国开始以前所未有的力度整治污染，河流的状况才得以改观。
O O O B-Time I-Time I-Time I-Time I-Time I-Time I-Time B-Abstract I-Abstract I-Abstract I-Abstract I-Abstract I-Abstract I-Abstract I-Abstract I-Abstract O O O B-Organization I-Organization I-Organization B-Time O O O O O O O O O O O O O O O B-Location I-Location O O O O O O O O O