The Mushroom War

Well people believe that there was a nuclear war in OOO. You can kinda believe that because you can see bombs, and a old tv. Well that explains why they all don't have technology, and there are no "functioning" working cars. (The reason why I say that is because you can see old cars around OOO.) Also if you have watched the episode "Simon & Marcy" they are living after nuclear war, and some mutated people.