Answer: solar energy.
- A solar energy
- B burning coal
- C crude petroleum
- D natural gas
Correct answer: A. solar energy
Explanation: Solar energy is renewable, unlike the fossil fuels coal, oil and gas.
Sunlight passes through the atmosphere and warms the surface; the surface re-radiates this energy as infrared heat, which greenhouse gases (CO₂, CH₄, water vapour) absorb and trap - a naturally beneficial process that intensifies into global warming as gas concentrations rise from human activity.
Concept context
Pollution, global warming, ozone depletion, deforestation, and sustainability. Important for NEET and general awareness.