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