Which of the following is NOT a point source of pollution? 

A)  pesticides sprayed into the air 
B)  an automobile tailpipe 
C)  a factory smokestack 
D)  a drainpipe from a power plant

Point Source

A single, identifiable source of pollution, such as a pipe or a drain, from which pollutants are discharged.

Pollution

The introduction of contaminants into the natural environment that cause adverse change to air, water, or soil.

Factory Smokestack

A large chimney through which industrial gases, smoke, and particles are expelled into the atmosphere, often associated with manufacturing plants.