railway RRB JE (CBT I + CBT II) Mock Test 2024 General Knowledge Ecology and Environment Environmental pollution
Consider the following statements regarding Air Pollution:
1. Orange colour in Air Quality Index denotes the severe condition of air pollution.
2. Heavy smog leads to the rise in the cases of rickets.
3. Biofiltration is one of the most effective ways to control air pollution.
Which of the statements given above is/are correct?
1
3 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3