Everyone knows that a drop of oil/petrol/diesel can contaminate so and so many hundreds of liters of water and cause damaging damage… Only why is that so and why can’t you ever see it? Everyone knows the images of oil-glued animals that are depleted. However, these are mere amounts of crude oil. What does a drop do? In spite of the oil change, a small swab is leaking in the ground – the grass grows and thrives, the vermin is crawling and flogging. I find nothing sufficiently objective on the Internet that can justify that a drop of oil is actually harmful. If the KFZler does not wash his hands, then every time oil gets to the dam that he eats. And that’s certainly more than a drop of oil in a career. Why is there this assertion, if one (apparently, perhaps I’m just too stupid) that there is nothing on the Internet about what exactly it does with which organisms it does? I don’t want to now take the oil companies for disasters and tanking gaps, but only understand what amounts of oil can be said.