Climate Change MCQs Set 21 (200+ Questions with Ansers) Posted on March 24, 2026March 31, 2026Author agropublishers 0 Table of Contents Toggle Climate Change MCQs Set 21 (200+ Questions with Answers) 1. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 530 tCO₂e 400 tCO₂e 600 tCO₂e 700 tCO₂e 2. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Cleansing agents Cooling agents Energy source Greenhouse gases 3. Longwave radiation in the Earth system primarily originates from ______________ Sun Stars Atmosphere Earth’s surface 4. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 265 tCO₂e 28 tCO₂e 210 tCO₂e 386 tCO₂e 5. A positive radiative forcing indicates _____________ Cooling of the Earth system Net energy loss from the Earth system No change in energy balance Net energy gain by the Earth system 6. Permafrost thaw contributes to climate tipping primarily through __________ Reduction in soil respiration Enhanced nitrogen fixation Release of CO₂ and CH₄ from previously frozen organic matter Increased albedo 7. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Accumulation of heat in the climate system Rainfall changes Wind formation Atmospheric pressure changes 8. Climate thresholds are important because they can ___________ Increase surface albedo Stabilize the climate system Trigger abrupt and potentially irreversible changes Reduce greenhouse gas emissions 9. Anthropogenic forcing differs from natural forcing because it _______ Results from human activities Is periodic Is driven by solar variability Is negligible 10. Climate variability typically operates over which time scale? Centuries Minutes Seconds Years to decades Loading … Question 1 of 10 Climate Change MCQs Set 21 (200+ Questions with Answers) Climate Change MCQs Set 21 (200+ Questions with Answers) 1. A positive radiative forcing indicates _____________ No change in energy balance Net energy gain by the Earth system Cooling of the Earth system Net energy loss from the Earth system 2. Climate thresholds are important because they can ___________ Reduce greenhouse gas emissions Trigger abrupt and potentially irreversible changes Increase surface albedo Stabilize the climate system 3. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Accumulation of heat in the climate system Wind formation Atmospheric pressure changes Rainfall changes 4. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 210 tCO₂e 386 tCO₂e 265 tCO₂e 28 tCO₂e 5. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 530 tCO₂e 700 tCO₂e 400 tCO₂e 600 tCO₂e 6. Permafrost thaw contributes to climate tipping primarily through __________ Increased albedo Release of CO₂ and CH₄ from previously frozen organic matter Enhanced nitrogen fixation Reduction in soil respiration 7. Climate variability typically operates over which time scale? Seconds Minutes Years to decades Centuries 8. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Cooling agents Energy source Cleansing agents Greenhouse gases 9. Longwave radiation in the Earth system primarily originates from ______________ Atmosphere Sun Earth’s surface Stars 10. Anthropogenic forcing differs from natural forcing because it _______ Results from human activities Is negligible Is periodic Is driven by solar variability Loading … Question 1 of 10 Climate Change MCQs Set 21 (200+ Questions with Answers)
