Answer: over 99%.
- A about 50%
- B over 99%
- C about 25%
- D less than 10%
Correct answer: B. over 99%
Explanation: Electrostatic precipitators are highly efficient and can remove over 99 percent of particulate matter from the exhaust of thermal power plants.
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.