Can we draw the following hypothesis from the context? 

Context:

How to take action against pollution on private property<br>Locate the appropriate state or local agency. Depending on the type of pollution or environmental hazard present, you may need to file a complaint with a particular state or local agency to get the problem resolved. [substeps] You may have to call your state agency in charge of environmental affairs to find out the appropriate agency with which to place your complaint.

Hypothesis: Pollution is mostly caused by people.
It's impossible to say