Name 4 clues that signal that a chemical reaction is taking place

i feel as if they would both catch on before to long because they would see them to frequent

well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.