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