Global Environmental Issues MCQs January 8, 2026August 13, 2024 by u930973931_answers 40 min Score: 0 Attempted: 0/40 Subscribe 1. What is the primary greenhouse gas responsible for global warming? (A) Methane (CH₄) (B) Carbon Dioxide (CO₂) (C) Nitrous Oxide (N₂O) (D) Chlorofluorocarbons (CFCs) 2. Which international agreement aims to limit global temperature rise to well below 2°C above pre-industrial levels? (A) Paris Agreement (B) Kyoto Protocol (C) Montreal Protocol (D) Rio Declaration 3. What term describes the gradual increase in Earth’s average temperature due to human activities? (A) Ozone depletion (B) Global warming (C) Acid rain (D) Greenhouse effect 4. Which of the following is a major source of methane emissions? (A) Fossil fuel combustion (B) Agricultural activities (C) Deforestation (D) Industrial processes 5. What environmental issue is caused by the depletion of the ozone layer? (A) Increased ultraviolet (UV) radiation (B) Acid rain (C) Global warming (D) Ocean acidification 6. Which of the following practices contributes to deforestation? (A) Sustainable agriculture (B) Reforestation (C) Conservation efforts (D) Logging 7. What is the primary cause of ocean acidification? (A) Increased marine traffic (B) Increased CO₂ absorption by oceans (C) Excessive fishing (D) Plastic pollution 8. Which phenomenon refers to the melting of polar ice caps and glaciers leading to rising sea levels? (A) Eutrophication (B) Desertification (C) Glacial retreat (D) Deforestation 9. What is the term for the process where excess nutrients in water bodies lead to harmful algal blooms? (A) Eutrophication (B) Acidification (C) Bioaccumulation (D) Overfishing 10. Which global issue is associated with the loss of biodiversity and habitats? (A) Climate change (B) Deforestation (C) Overpopulation (D) Desertification 11. Which gas is primarily responsible for the depletion of the ozone layer? (A) Methane (B) Carbon Dioxide (C) Chlorofluorocarbons (CFCs) (D) Nitrous Oxide 12. What term is used to describe the contamination of soil, air, and water with harmful substances? (A) Acid rain (B) Deforestation (C) Eutrophication (D) Pollution 13. Which international protocol aims to reduce greenhouse gas emissions? (A) Paris Agreement (B) Montreal Protocol (C) Kyoto Protocol (D) Stockholm Convention 14. Which of the following is a consequence of melting glaciers and ice caps? (A) Decreased sea levels (B) Rising sea levels (C) Increased biodiversity (D) Decreased ocean acidification 15. What is the main cause of the “hole” in the ozone layer over Antarctica? (A) Human-made chemicals like CFCs (B) Volcanic eruptions (C) Natural climatic changes (D) Ocean currents 16. What global environmental issue is caused by over-extraction of groundwater? (A) Desertification (B) Soil erosion (C) Ocean acidification (D) Marine pollution 17. Which of the following is a major effect of global warming on weather patterns? (A) Increased frequency of extreme weather events (B) Decreased rainfall (C) Stabilized temperature (D) Reduced storm intensity 18. What is the primary source of plastic pollution in oceans? (A) Single-use plastics and waste (B) Industrial discharge (C) Agricultural runoff (D) Mining activities 19. Which concept refers to the loss of fertile land due to drought and overuse? (A) Eutrophication (B) Glacial retreat (C) Overfishing (D) Desertification 20. What global environmental issue is linked to the loss of Arctic sea ice? (A) Ocean acidification (B) Desertification (C) Rising sea levels and disrupted ecosystems (D) Overfishing 21. Which term refers to planting trees to restore deforested areas? (A) Reforestation (B) Afforestation (C) Desertification (D) Agroforestry 22. What is the term for the gradual decrease in biodiversity in an ecosystem? (A) Extinction (B) Habitat loss (C) Species decline (D) Endangerment 23. Which international agreement aims to protect the ozone layer? (A) Montreal Protocol (B) Kyoto Protocol (C) Paris Agreement (D) Stockholm Convention 24. What is the main environmental impact of industrial agriculture? (A) Increased biodiversity (B) Enhanced soil fertility (C) Soil erosion and water pollution (D) Decreased greenhouse gas emissions 25. Which term describes converting agricultural land into urban areas? (A) Reforestation (B) Desertification (C) Urbanization (D) Afforestation 26. What environmental problem is linked to excessive fertilizer use? (A) Eutrophication (B) Soil erosion (C) Ocean acidification (D) Deforestation 27. Which of the following is a direct consequence of overfishing? (A) Collapse of fish populations (B) Increased biodiversity (C) Ocean acidification (D) Soil degradation 28. What is a major effect of air pollution on human health? (A) Improved respiratory function (B) Strengthened immune system (C) Enhanced cognitive abilities (D) Increased risk of respiratory and cardiovascular diseases 29. Which of the following is a renewable energy source? (A) Natural gas (B) Coal (C) Nuclear power (D) Wind power 30. What term describes temperature rise and changing precipitation patterns? (A) Climate change (B) Environmental degradation (C) Desertification (D) Urbanization 31. Which practice contributes to soil degradation? (A) Sustainable agriculture (B) Overgrazing by livestock (C) Crop rotation (D) Cover cropping 32. What is the primary goal of conservation biology? (A) Promote economic growth (B) Enhance technological innovation (C) Protect and restore biodiversity and ecosystems (D) Increase industrial production 33. Which phenomenon results from increased rainfall after deforestation? (A) Erosion (B) Desertification (C) Flooding (D) Glacial retreat 34. Which is a major cause of urban air pollution? (A) Agricultural practices (B) Industrial emissions (C) Coastal erosion (D) Soil erosion 35. What is a key consequence of ocean plastic pollution? (A) Improved marine biodiversity (B) Enhanced water quality (C) Harm to marine life and ecosystems (D) Decreased sea levels 36. What does “carbon footprint” refer to? (A) Carbon stored in soil (B) Total CO₂ emissions produced by an individual or entity (C) Rate of carbon sequestration (D) Atmospheric CO₂ concentration 37. Which environmental issue is linked to coral reef loss? (A) Desertification (B) Ocean acidification (C) Overfishing (D) Deforestation 38. What does “sustainable development” mean? (A) Encouraging resource depletion (B) Focusing only on economic growth (C) Prioritizing technology over environment (D) Meeting present needs without harming future generations 39. What is a major consequence of climate change on wildlife? (A) Increased populations (B) Improved reproductive rates (C) Habitat loss and altered migration patterns (D) Reduced competition 40. Which of the following helps mitigate climate change? (A) Deforestation (B) Increased fossil fuel use (C) Afforestation and reforestation (D) Waste incineration