Air or water pollutant

Exercise and reference answers

Upper category

Air

Lower category

Water

Items

1. Category

   Air

   Item

   Smog

2. Category

   Air

   Item

   CFCs

3. Category

   Air

   Item

   Soot

4. Category

   Air

   Item

   SO2

5. Category

   Water

   Item

   Sewage

6. Category

   Water

   Item

   Arsenic

7. Category

   Water

   Item

   Algae

8. Category

   Water

   Item

   Fluoride

Instructions

Send each pollutant to the air track or the water track.

Explanation