Good Riddles

Question: If green means go, yellow means slow down or caution, and red means stop. Why can't traffic lights go when they turn to green?

Question: I'm in every room, yet outside. I move at different paces, but you never see me moving. Where ever I am its crowded, but when your there you don't see or feel anyone. If you try to hit me you always miss, yet you always feel me. You need me to live, but I cause disasters. What am I?

Question: What is it that no one wants to have, but if he has it, he doesn't want to lose it?

Question: There were 10 horses and 9 paddocks. How do you fit all 10 horses in the paddocks with only 1 allowed in each paddock?

Question: I see you, you see me; I raise my right, you raise your left. What am I?