Which of the following reasons is the main cause of Acid rain?

1. Due to the emission of CO₂ in the air
2. Due to the emission of Carbon Monoxide in the air
3. Due to the emission of Sulphur dioxides in the air
4. All the above

Which of the following is a secondary pollutant?

1. Smoke
2. Ozone
3. Sulphur dioxides
4. Dust

Which of the following chemical compounds is mainly responsible for the formation of ozone hole?

1. CO₂
2. CFC
3. SO₂
4. NO

Study the picture and identify which type of environmental pollution is mainly caused by the activity practised here.

1. Noise pollution
2. Water pollution
3. Air pollution
4. Radioactive pollution