Question

What are the main sources of air pollution in cities

• A. Energy flow will be blocked
• B. Herbivores will not receive solar energy
• C. Mineral movement will be blocked
• D. Rate of decomposition will be very high

Answer 1

The correct option is D Rate of decomposition will be very high

The main sources of pollution in cities are vehicles and industries.
In cities, air may be severely polluted not only by transportation but also by the burning of fossil fuels (oil and coal) in generating stations, factories, office buildings, and homes and by the incineration of garbage.