the difference is that a point source pollution comes from a specific site & the non-point source pollution comes from many sources rather than a single specific site.

or

point source pollution is pollution that comes from a known and specific location. Nonpoint source pollution is pollution that does not have a specific point of orign....................:-)Hisme John

point-source of pollution is easy to because we can control it at the same site where the pollution source is originated.

Nonpoint source pollution is difficult to regulate.

Point-source pollution

the difference is that a point source pollution comes from a specific site & the non-point source pollution comes from many sources rather than a single specific site.

or

point source pollution is pollution that comes from a known and specific location. Nonpoint source pollution is pollution that does not have a specific point of orign....................:-)Hisme John

Smog is not a type of point source pollution neither is smoke or fog.