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