Car motor engine

Hi. Modern engines have a cooling system with an water exaustion tube. Maybe 30 or even 50 years ago this water exaustion tube wasn't there, and the water that accumulates in the cooling system just dropped anywhere. So, in my perspective, modern engines all have a water exaustion tube so that the water that accumulates in the engine is taken out. So, in the factories, when the engines are made, these water exaustion tube may be clogged with some sort of plastic piece. And, if this piece isn't taken out, in any way, the water that accumulates in the cooling system doesn't come out, and so the engine doesn't cool properly, and it starts to malfunction, and the cooling gases of the cooling system start to come out. That's when the cooling system goes wrong, the kind of CFC gases start to come out. And, theses gases are extremely poisonous. And they affect the planet's atmosphere. And, it could be what's keeping the planet's ozone layer all wrong. So, anyone who owns an engine with a cooling system, being it a refrigerator, a motorbike, or even a car, should be careful and take good care of the machine. Because not only the machine doesn't goes wrong so easilly, but also it's a polluting responsibility. So, I hope this helps. Thanks.