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