71. What is the primary cause of ocean acidification?
- A. Methane emissions
- B. Carbon dioxide absorption
- C. Nitrous oxide emissions
- D. Ozone depletion
Answer: B. Carbon dioxide absorption
Explanation:
Ocean acidification occurs when oceans absorb excess carbon dioxide from the atmosphere, which reacts with seawater to form carbonic acid, lowering the pH of the water.
72. Which of the following is considered a short-lived climate pollutant?
- A. Carbon dioxide (CO₂)
- B. Water vapor (H₂O)
- C. Methane (CH₄)
- D. Nitrogen (N₂)
Answer: C. Methane (CH₄)
Explanation:
Methane (CH₄) is a short-lived climate pollutant with a high global warming potential, but it remains in the atmosphere for a much shorter time compared to carbon dioxide.
73. Which renewable energy source is most dependent on geographic location for efficiency?
- A. Solar energy
- B. Wind energy
- C. Geothermal energy
- D. Biomass energy
Answer: C. Geothermal energy
Explanation:
Geothermal energy is highly dependent on geographic location, as it requires access to regions with significant geothermal activity, such as volcanic areas.
74. The Paris Agreement aims to limit global warming to below which temperature threshold compared to pre-industrial levels?
- A. 1.0°C
- B. 1.5°C
- C. 2.0°C
- D. 3.0°C
Answer: B. 1.5°C
Explanation:
The Paris Agreement sets a goal to limit global warming to below 2°C, with efforts to further limit the increase to 1.5°C compared to pre-industrial levels to reduce the impacts of climate change.
75. Which of the following sectors is the largest source of methane (CH₄) emissions globally?
- A. Transportation
- B. Agriculture
- C. Energy production
- D. Waste management
Answer: B. Agriculture
Explanation:
Agriculture is the largest source of methane emissions, particularly from livestock digestion and rice paddies, which emit large amounts of methane into the atmosphere.
76. Which of the following practices can reduce the carbon footprint of agriculture?
- A. Using synthetic fertilizers
- B. Practicing monoculture
- C. Implementing agroforestry
- D. Increasing tillage
Answer: C. Implementing agroforestry
Explanation:
Agroforestry, which integrates trees and shrubs into agricultural systems, helps reduce the carbon footprint of agriculture by enhancing carbon sequestration and promoting biodiversity.
77. Which of the following pollutants is a precursor to ozone formation at ground level (tropospheric ozone)?
- A. Carbon monoxide (CO)
- B. Nitrogen oxides (NOₓ)
- C. Methane (CH₄)
- D. All of the above
Answer: D. All of the above
Explanation:
Ground-level ozone (tropospheric ozone) is formed when pollutants such as carbon monoxide (CO), nitrogen oxides (NOₓ), and methane (CH₄) react in the presence of sunlight.
78. Which of the following practices can help mitigate global warming by increasing carbon storage in soils?
- A. Overgrazing
- B. Intensive tillage
- C. Conservation agriculture
- D. Use of synthetic pesticides
Answer: C. Conservation agriculture
Explanation:
Conservation agriculture practices, such as minimal tillage, crop rotation, and cover cropping, can enhance carbon storage in soils, helping to mitigate global warming.
79. Which of the following greenhouse gases is produced by the breakdown of organic waste in landfills?
- A. Nitrous oxide (N₂O)
- B. Carbon dioxide (CO₂)
- C. Methane (CH₄)
- D. Ozone (O₃)
Answer: C. Methane (CH₄)
Explanation:
Methane (CH₄) is produced during the anaerobic decomposition of organic waste in landfills, making it a significant source of methane emissions.
80. Which of the following gases is both a potent greenhouse gas and contributes to the formation of acid rain?
- A. Nitrous oxide (N₂O)
- B. Sulfur dioxide (SO₂)
- C. Carbon dioxide (CO₂)
- D. Methane (CH₄)
Answer: B. Sulfur dioxide (SO₂)
Explanation:
Sulfur dioxide (SO₂) is a major contributor to the formation of acid rain and is also a potent greenhouse gas, particularly when released in large quantities from industrial activities.
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