The Answer is true i think
The answer would be "B. cocaine". Cocaine is an illegal stimulant unlike the other options listed above.
A common way for infectious diseases to spread is through the direct transfer of bacteria, viruses or other germs from one person to another.
<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.
Answer:
I don't know but good luck :)