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Question

Which of the following DOES NOT produce Greenhouse gases?

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
Tidal energy

Analyzing Greenhouse Gas Production

Greenhouse gases (GHGs) trap heat in the Earth's atmosphere. We need to identify which option does NOT release these gases.

Option Breakdown

  • Natural gas transport fuel: Uses natural gas, a potent GHG (methane). Combustion releases CO2, and leaks release methane. Produces GHGs.
  • Thermal power plant: Typically burns fossil fuels (coal, gas, oil) to generate electricity. This process releases significant amounts of CO2 and other GHGs. Produces GHGs.
  • Diesel generator: Burns diesel fuel, a fossil fuel. Combustion releases CO2 and other GHGs. Produces GHGs.
  • Tidal energy: Harnesses the movement of tides. This process does not involve combustion or chemical reactions that release GHGs during operation. Does NOT produce GHGs.

Conclusion

Tidal energy is a renewable energy source that operates without emitting greenhouse gases, unlike the other options which rely on fossil fuels or natural gas.

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