China air pollution: Air Quality Index explained

The video tutorial discusses the impact of pollution from car exhausts, leading to high concentrations of particulate matter. These particles, identified by their aerodynamic diameters, pose significant health risks, especially fine particulate matter smaller than 2.5 micrometers, which can penetrate deep into the lungs. The air pollution index is used to measure pollution levels, with 100 points considered unhealthy and 300 points or above deemed dangerous.

What is particulate matter primarily formed from?

• Household dust

• Industrial waste

• Ocean spray

• Car exhaust pollution

How are particulate matter particles identified?

• By their chemical composition

• By their weight

• By their aerodynamic diameters

• By their color

What is the size comparison of fine particulate matter to a human hair?

• 10 times smaller

• 40 times smaller

• 20 times smaller

• 30 times smaller

What health risk is associated with inhaling fine particulate matter?

• It affects vision

• It reaches deep into the lungs causing harm

• It can lead to digestive issues

• It causes skin irritation

At what point on the air pollution index is air considered dangerous?

• 400 points

• 300 points

• 200 points

• 100 points