Acid rain

Rainwater is naturally slightly acidic due to carbon dioxide forming weak carbonic acid. However, acid rain is more acidic because of pollutants like sulfur and nitrogen oxides. Acid rain can damage plants, animals, buildings, and rocks.

What causes rainwater to be naturally slightly acidic?

• Presence of oxygen in the air

• Presence of sulfur in the air

• Presence of carbon dioxide in the air

• Presence of nitrogen in the air

Which pollutants contribute to the increased acidity of acid rain?

• Lead and mercury

• Carbon monoxide and methane

• Ozone and particulate matter

• Sulfur oxides and nitrogen oxides

How does acid rain affect the environment?

• It strengthens building materials

• It purifies water bodies

• It enhances plant growth

• It harms plants and animals

What is one of the effects of acid rain on buildings?

• It strengthens their structure

• It erodes them

• It makes them fire-resistant

• It makes them more colorful

Which of the following is NOT a consequence of acid rain?

• Harm to plant life

• Damage to aquatic life

• Improvement of air quality

• Erosion of rocks