Description

1. Gas masks are used to protect the wearers from pollutants and
   toxic materials. I used a gas mask to represent air pollution
   because people wear gas mask when the air is unhealthy.

2. The color of the gas mask is from green to purple. According to
the Air Quality Index Color Code Guide, green means that the
air is good or healthy whereas purple means that the air is very
unhealthy. So, the color of the gas mask is from green to purple
to show how our air is becoming unhealthier from time to time.

3. On the middle of the respirator, there is a radioactive sign to
show that we have been inhaling dangerous pollutants that are
flowing through the air.

4. The eyepiece of the gas mask is grey color to show how abvious
and how frequently haze has been clouding our air.

5. The filter is black in color to show how dirty the filtrates are
when the air is filtered.