Pollution

While researching on Auraria Library, I found this book, Marine Pollution: What Everyone Needs to Know. The author mainly focuses on the pollution that happens in oceans. She also explains the major sources of pollution in the marine environment such as ocean dumping, point sources, and nonpoint sources.

She argues that these contaminations occur not because of ocean dumping, but rather as a result of factories and sewage treatment plants releasing their wastes into receiving waters through a pipe, which is also called point source pollution. She also explains nonpoint source pollution, which they're the diffuse runoffs and atmospheric depositions, where contaminants come from the soil, streets, construction sites.
She also provides a diagram of how nonpoint source pollution might occur:

I think I can use this book as a source for answering my question on whether pollution is really caused by humans or not and how it can controlled.

http://0-lib.myilibrary.com.skyline.ucdenver.edu/Open.aspx?id=650466