You just caught your younger brother smoking a cigarette. he is only eight years old. what would you say to him to convince him to stop smoking?

Honestly, I would tell him that (if he plays sports or plans of doing it) the smoke and carbon chemicals that he is inhaling in his lungs are going to inhibit him from ever being able to do that. Also, he needs to understand that there are many health problems that can come from cigarettes are devastating. He could get lung cancer, lip cancer, liver cancer, etc. I hope this helps you. 

"air pollution" is the correct answer i believe

Few days to several months depending on the severity of the stroke ;