Air or water

Exercise and reference answers

Upper category

Air

Lower category

Water

Items

1. Category

   Air

   Item

   Smoke

2. Category

   Air

   Item

   Noise

3. Category

   Air

   Item

   PM 2.5

4. Category

   Air

   Item

   CNG buses

5. Category

   Water

   Item

   Sewage

6. Category

   Water

   Item

   BOD

7. Category

   Water

   Item

   Bloom

8. Category

   Water

   Item

   Hyacinth

Instructions

Send each wagon to the kind of pollution it belongs to.

Explanation