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#1
By TheQuizWire
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Hard
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Fact Checked
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22 Jan 2026
Which potent greenhouse gas class is the Kigali Amendment to the Montreal Protocol designed to phase down?
💡 Explanation:The Kigali Amendment to the Montreal Protocol, adopted in 2016, is designed to phase down the production and consumption of Hydrofluorocarbons (HFCs). HFCs are powerful greenhouse gases that were introduced as replacements for ozone-depleting substances (ODS) like CFCs and HCFCs, which were the original focus of the Protocol. The Amendment is expected to prevent up to 0.5 degrees Celsius of global temperature rise by 2100.
#2
By TheQuizWire
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Medium
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Fact Checked
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12 Jan 2026
Which property primarily makes a greenhouse gas highly potent (high GWP)?
💡 Explanation:The Global Warming Potential (GWP) of a gas is determined by its atmospheric lifetime and its radiative efficiency (the ability to trap heat). Gases with a high capacity for absorbing infrared radiation (a measure of radiative efficiency) are highly potent because each molecule traps a large amount of outgoing terrestrial heat. A long atmospheric lifetime further contributes to a high GWP over a specified time horizon (e.g., 100 years).
#3
By TheQuizWire
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Medium
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Fact Checked
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14 Dec 2025
What is the primary cause of cultural eutrophication in freshwater bodies?
💡 Explanation:Cultural eutrophication is the acceleration of the natural aging process of water bodies due to human activity. It is primarily caused by excessive input of limiting nutrients, mainly nitrates and phosphates, from sources like agricultural and urban runoff. This over-enriches the water, leading to algal blooms and subsequent oxygen depletion (hypoxia).
#4
By TheQuizWire
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Hard
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Fact Checked
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11 Dec 2025
Which Kyoto Protocol mechanism allows Annex I nations to fund emission reduction projects in Non-Annex I nations for certified credits?
💡 Explanation:The Clean Development Mechanism (CDM) is one of the Kyoto Protocol's three flexible mechanisms. It allows industrialized countries (Annex I) with emission reduction commitments to invest in emission reduction projects in developing countries (Non-Annex I). In return, they receive Certified Emission Reduction (CER) credits, which they can use to meet their own emission targets. This promotes sustainable development in Non-Annex I countries while helping Annex I countries meet their commitments cost-effectively.
Distractors:
- Joint Implementation (JI) allows Annex I countries to trade Emission Reduction Units (ERUs) from projects in *another* Annex I country.
- Emissions Trading Scheme (ETS) allows Annex I countries to trade Assigned Amount Units (AAUs) among themselves.
- Global Stocktake (GST) is a process under the Paris Agreement (not Kyoto) to assess collective progress.
#5
By TheQuizWire
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Medium
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10 Nov 2025
Which global sector is the largest source of anthropogenic greenhouse gas emissions?
💡 Explanation:The Energy Sector (electricity, heat, and transport) is the primary source of global human-caused greenhouse gas emissions.
#6
By TheQuizWire
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Medium
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08 Nov 2025
Which waste stream is the fastest-growing globally and contains hazardous metals?
💡 Explanation:E-waste is the fastest-growing waste stream and poses risks due to toxic components like lead and mercury.
#7
By TheQuizWire
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Medium
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08 Nov 2025
Which 1987 treaty successfully phased out ozone-depleting substances?
💡 Explanation:The Montreal Protocol is a landmark international agreement that successfully reduced the production of CFCs to protect the ozone layer.
#8
By TheQuizWire
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Medium
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07 Nov 2025
What is the single largest pathway for plastic pollution entering oceans?
💡 Explanation:About 80% of marine plastic originates from land, transported primarily by major river systems.
#9
By TheQuizWire
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Medium
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07 Nov 2025
What process describes the increasing concentration of toxins up the food chain?
💡 Explanation:Biomagnification is the accumulation of toxins at higher concentrations in organisms higher up the food chain.
#10
By TheQuizWire
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Medium
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05 Nov 2025
What process involves nutrient enrichment leading to algal blooms and dead zones?
💡 Explanation:Eutrophication is the nutrient-driven boom in plant life that depletes oxygen in water bodies.
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