: Comes from a specific, identifiable location, such as a factory pipe or a sewage treatment plant .
Water pollution is categorized primarily by how it enters the environment: environmental science 14.3 water pollution answer key
He wasn't just looking for the answer key to finish his homework; he was looking for a way to explain why the creek behind his house had turned a murky, metallic orange. : Comes from a specific, identifiable location, such