Question

Which of the following is a pollution-free source of energy?

• A. Solar energy
• B. Hydro-electric energy
• C. Wind energy
• D. All of these

Hint:

Renewable energy helps fight climate change by reducing greenhouse gas emissions. India invests heavily in solar and wind power.

Answer 1

The Correct Option is D

Step 1: Conceptual Background:
Energy sources are divided into two categories — renewable (clean) and non-renewable (polluting). Renewable sources like solar, wind, and hydro do not release harmful gases, while non-renewable sources like coal, petroleum, and natural gas emit carbon dioxide, carbon monoxide, sulphur dioxide, and other pollutants. Step 2: Analysis of Options:
Solar energy: Derived from the sun. No harmful gases are released during its use. Widely used in solar panels, solar cookers, and heaters.
Hydro-electric energy: Generated by flowing water stored in dams. It does not produce greenhouse gases during generation.
Wind energy: Produced by wind turbines. Completely clean and renewable, does not emit pollutants.
All of these sources are pollution-free compared to fossil fuels.
Step 3: Final Answer:
Since solar, hydro-electric, and wind energy are all clean energy sources, the correct answer is All of these.