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