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