Harbin, China air pollution: Air Quality Index explained

The video explains how car exhausts contribute to particulate matter, which is identified by aerodynamic diameters and linked to health issues. Fine particles, smaller than 2.5 micrometers, pose significant health risks as they penetrate deep into the lungs. The air pollution index measures air quality, with 100 points being unhealthy and 300 points considered dangerous.

What is particulate matter primarily composed of?

• Solid and liquid particles

• Ozone

• Gaseous emissions

• Water vapor

How does fine particulate matter affect human health?

• It causes skin irritation

• It can penetrate deep into the lungs

• It improves respiratory function

• It has no significant health effects

What is the size comparison between fine particulate matter and a human hair?

• Fine particulate matter is twice as large

• Fine particulate matter is larger

• They are the same size

• Fine particulate matter is more than 30 times smaller

At what point on the air pollution index is air quality considered unhealthy?

• 100 points

• 300 points

• 50 points

• 200 points

What air pollution index value is considered dangerous?

• 150

• 300 and above

• 200

• 250