and nuclear war ? I have read predictions of the future that even after a large scale nuclear war and pollution, some parts of Earth would have an atmosphere so toxic as to require domed cities to protect from the poisonous air, while other parts of the Earth would be lush and green with a clean...
...something ? I believe children should be allowed to give an explanation as long as it's done in a respectful manner. The explanation just might shed light on the subject.