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