Another dangerous factor is that the water pollution including industrial wastes and poisonous gases which eventually blacken rivers and form acid rains.
Another dangerous factor is that the water pollution including industrial wastes and poisonous gases which eventually blacken rivers and form acid rains.
另一种危险是水的污染，包括工业废物和有毒气体，这些东西最终会使河流变黑并且形成酸雨。