Places of residence

Question 8: Where do you think formaldehyde come from?
A. Furniture
B. Oil paint
C. Cosmetics
D. Carpet
E. Automobile exhaust

From these five charts, we found that, people from different places all have the bigger proportion to consider the furniture and oil are the main reason to lead to formaldehyde pollution. And hardly any people know that formaldehyde could be caused by cosmetics. People from city could better know the formaldehyde might be brought by automobile exhaust. And cause the small number of the foreigners, so the statistics of people abroad might not be authentic.