<h2>Answer:</h2>
<u>Natural gas is indoor pollutant</u>
<h2>Explanation:</h2>
From the options given above smog and vehicle exhaust are outdoor pollutants. Oxygen is not a pollutant at all. The only option left is natural gas. When we cook food or use heaters we use natural gas so the burning of natural gas pollutes the indoor environment that is why we can say that natural gas is indoor pollutants.
The best exercise you can get involves a whole body word out and a good diet<span />
Family life and sexual health?
C - both A and B. The digestive system does those two.
Procrastinating on if he wants the treatment or not.
