Good Riddles

Question: I am around everything, everything that lives because of me. What am I?

Question: What's the only school where you have to drop out to graduate?

Question: I am god to many people despite not being a spirit. I am what people kill over, lust over, and fight over. I am not God or the Devil, but a mere material that people need endlessly. What am I?

Question: What is at the end of everything?

Question: There was a window cleaner who was cleaning a window on the 25th floor of a skyscraper. He suddenly slips and falls. He has no safety equipment and nothing to soften his fall, but he is not hurt at all. How do you account for that?