That statement is false
Paint and solvents contain a lot of dangerous chemical that may harm your body. According to Occupational Safety and Health Administration, prolonged exposure to paint and solvent could cause toxicity in your nervous system, reproductive damage, skin disease, and cancer
The answer is Rollerblading. If its in a long duration of time and is aerobic, that should be the answer. As long as you're breathing as well as you should :)
Smokeing is very bad for a childs lungs. Side smoking kill mank children every year. The risk of cancer is less for the child