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