Question

there are _____classes of pollutants​

Answer 1

Answer:

Types of primary pollutants include:

Nitrogen oxides (NOx)

Carbon monoxide (CO)

Volatile organic compounds (VOCs)

Sulfur oxides (SOx)

Particulate matter (PM)

Mercury.

and more.

Sep 3, 2018

Answer 2

Answer:

there are five classes of pollutants.