It is impossible to track sources of pollution so using drains for disposal often hides an automobile mechanical shop's wastes

Answer: True.

Although some sources of pollution may be tracked, drainage systems of some companies and corporations are used to hide the waste that they dispose off. This practice may be harming a lot of our water supplies around the world, but depending on the rules of their country, there is really nothing we can do but do our part by fighting for a cleaner disposal of their waste.