. Diamonds are the hardest substance on Earth. Fact or Opinion Explain: 14. McDonalds sells more hamburgers than any other restaurant chain in the world. Fact or Opinion Explain: 15. Horse manure smells awful. Fact or Opinion Explain: 16. The price of gas has grown to become too expensive. Fact or Opinion Explain: 17. Chicken has more protein than carrots. Fact or Opinion Explain: 18. The more money someone has the more successful they are. Fact or Opinion Explain: 19. Vegetarians are healthier than people who eat meat. Fact or Opinion Explain: 20. Cell phones emit radiation that may or may not cause brain cancer. Fact or Opinion Explain: 21. Students have a lot harder time in school than the teachers. Fact or Opinion Explain: 22. Popular music today is not as good as it was in the past. Fact or Opinion Explain: 23. It is illegal to yell out “Fire” in a crowded movie theater. Fact or Opinion Explain: