Question

The principle difference between point source and nonpoint source water pollution is _______.
a.
whether the pollution is organic or inorganic
b.
the number of sources of pollution
c.
the amount of pollution
d.
whether it is from commercial or agricultural sources

Answer 1

b. the number of sources of pollution

Point-source pollution comes from a single, identifiable source (e.g., a pipe, factory outfall); nonpoint-source pollution is diffuse, coming from many dispersed sources (e.g., agricultural or urban runoff).