The so-called area source pollution refers to the dissolved or solid pollutants flowing into the receiving water body (including rivers, lakes, reservoirs and bays) through the runoff process from non-specific places under the scouring action of precipitation (or snow melting), and causing water eutrophication or other forms of pollution. It is a type of water environment pollution relative to point source pollution.
According to the above definition, which of the following cases belongs to area source pollution:
Acid rain has caused soil pollution and a large reduction in crop production