Q1: 1. Which of the following gases is a major contributor to the greenhouse effect?

• A) Oxygen
• B) Carbon dioxide
• C) Nitrogen
• D) Hydrogen

Q2: 2. Which of the following pollutants is a primary component of photochemical smog?

• A) Sulfur dioxide
• B) Nitrogen dioxide
• C) Carbon monoxide
• D) Methane

Q3: 3. What is the major source of lead pollution in the environment?

• A) Pesticides
• B) Paint
• C) Natural gas
• D) Soil erosion

Q4: 4. Which of the following is a common anthropogenic source of sulfur dioxide emissions?

• A) Volcanic eruptions
• B) Forest fires
• C) Burning of coal
• D) Oceanic emissions

Q5: 5. What is the major cause of ozone depletion in the stratosphere?

• A) Carbon monoxide emissions
• B) Nitrogen oxide emissions
• C) Chlorofluorocarbons (CFCs)
• D) Methane emissions

Q6: 6. Which of the following pollutants can cause eutrophication in water bodies?

• A) Phosphates
• B) Mercury
• C) Radon
• D) Ozone

Q7: 7. What is a major source of mercury pollution in aquatic ecosystems?

• A) Nuclear power plants
• B) Industrial wastewater
• C) Landfills
• D) Natural weathering of rocks

Q8: 8. Which of the following pollutants is associated with indoor air pollution?

• A) Radon
• B) Ozone
• C) Carbon dioxide
• D) Nitrogen dioxide

Q9: 9. What is the primary greenhouse gas emitted from agricultural practices?

• A) Methane
• B) Carbon monoxide
• C) Hydrogen sulfide
• D) Ammonia

Q10: 10. Which of the following pollutants is a common byproduct of vehicle emissions?

• A) Lead
• B) Nitrogen oxides
• C) Asbestos
• D) Radon

Q11: 11. What is the main cause of acid rain formation?

• A) Carbon dioxide emissions
• B) Nitrogen oxide emissions
• C) Sulfur dioxide emissions
• D) Methane emissions

Q12: 12. Which of the following pollutants is a major component of secondhand smoke?

• A) Carbon monoxide
• B) Formaldehyde
• C) Lead
• D) Methane

Q13: 13. What is the primary source of indoor air pollution from cooking and heating in developing countries?

• A) Radon
• B) Lead
• C) Carbon monoxide
• D) Particulate matter

Q14: 14. Which of the following pollutants is a major concern in groundwater contamination?

• A) Arsenic
• B) Carbon dioxide
• C) Ozone
• D) Sulfur dioxide

Q15: 15. What is the primary source of volatile organic compounds (VOCs) in urban areas?

• A) Wildfires
• B) Industrial emissions
• C) Agricultural runoff
• D) Landfills

Q16: 16. Which of the following pollutants is a major contributor to the depletion of the ozone layer in the stratosphere?

• A) Methane
• B) Nitrogen oxides
• C) Chlorofluorocarbons (CFCs)
• D) Carbon monoxide

Q17: 17. What is the primary source of mercury exposure for individuals consuming contaminated fish?

• A) Air pollution
• B) Soil erosion
• C) Industrial waste
• D) Bioaccumulation in aquatic food chains

Q18: 18. Which of the following pollutants is a major concern in indoor air quality from building materials?

• A) Ozone
• B) Asbestos
• C) Nitrogen dioxide
• D) Hydrogen sulfide

Q19: 19. What is the primary source of nitrogen oxide emissions from transportation activities?

• A) Passenger cars
• B) Bicycles
• C) Shipping vessels
• D) Airplanes

Q20: 20. Which of the following pollutants is a major concern in indoor air quality from household cleaning products?

• A) Lead
• B) Radon
• C) Formaldehyde
• D) Ammonia

Q21: 21. What is the primary source of carbon monoxide emissions in residential settings?

• A) Gas stoves
• B) Solar panels
• C) Wind turbines
• D) Electric heaters

Q22: 22. Which of the following pollutants is a common byproduct of tobacco smoke?

• A) Sulfur dioxide
• B) Carbon monoxide
• C) Particulate matter
• D) Nitrogen dioxide

Q23: 23. What is the major source of sulfur dioxide emissions in the atmosphere from industrial activities?

• A) Mining operations
• B) Textile production
• C) Oil drilling
• D) Coal combustion

Q24: 24. Which of the following pollutants is a common component of vehicle exhaust that contributes to smog formation?

• A) Lead
• B) Methane
• C) Carbon dioxide
• D) Nitrogen oxides

Q25: 25. What is the primary source of particulate matter emissions in urban environments from combustion processes?

• A) Diesel engines
• B) Electric vehicles
• C) Solar panels
• D) Biofuels