MCQ 51:
What is the main purpose of the Montreal Protocol?
A) To reduce greenhouse gas emissions
B) To phase out ozone-depleting substances
C) To promote renewable energy
D) To enhance biodiversity
Answer: B) To phase out ozone-depleting substances
Explanation: The Montreal Protocol, adopted in 1987, aims to protect the ozone layer by phasing out the production and use of substances that deplete it, such as CFCs.
MCQ 52:
Which of the following is a method to conserve water?
A) Overwatering lawns
B) Using low-flow fixtures
C) Leaving the tap running
D) Using excessive fertilizers
Answer: B) Using low-flow fixtures
Explanation: Low-flow fixtures reduce water usage in households, helping conserve water without compromising functionality.
MCQ 53:
What is the primary cause of habitat destruction?
A) Urbanization
B) Wildlife conservation
C) Sustainable agriculture
D) Eco-friendly tourism
Answer: A) Urbanization
Explanation: Urbanization often leads to habitat destruction as natural landscapes are converted into cities, roads, and infrastructure, resulting in the loss of ecosystems and biodiversity.
MCQ 54:
Which of the following practices can help mitigate climate change?
A) Increasing fossil fuel consumption
B) Deforestation
C) Afforestation
D) Overgrazing
Answer: C) Afforestation
Explanation: Afforestation, the planting of trees in an area where there was no previous tree cover, helps sequester carbon dioxide from the atmosphere, thus mitigating climate change.
MCQ 55:
What is the term for the intentional introduction of species into an ecosystem where they do not naturally occur?
A) Endemic species
B) Reforestation
C) Invasive species
D) Translocation
Answer: D) Translocation
Explanation: Translocation refers to the deliberate movement of species to new locations, which can be beneficial or harmful depending on the species and context.
MCQ 56:
What is the primary environmental issue associated with fast fashion?
A) Increased biodiversity
B) Water pollution
C) Sustainable development
D) Carbon sequestration
Answer: B) Water pollution
Explanation: The fast fashion industry often contributes to water pollution through the use of harmful dyes and chemicals in the manufacturing process, affecting rivers and ecosystems.
MCQ 57:
Which of the following is a benefit of biodiversity?
A) Increased risk of extinction
B) Greater resilience to environmental changes
C) Reduced ecosystem productivity
D) Increased competition among species
Answer: B) Greater resilience to environmental changes
Explanation: Biodiversity enhances ecosystem resilience, allowing communities to better withstand environmental changes and disturbances.
MCQ 58:
What is the term for the variety of life in a particular habitat or ecosystem?
A) Genetic diversity
B) Species diversity
C) Ecosystem diversity
D) Biodiversity
Answer: D) Biodiversity
Explanation: Biodiversity encompasses the variety of life forms within a given habitat, including genetic diversity, species diversity, and ecosystem diversity.
MCQ 59:
What is the effect of using chemical fertilizers on soil?
A) Improved soil structure
B) Decreased soil fertility over time
C) Increased organic matter
D) Enhanced biodiversity
Answer: B) Decreased soil fertility over time
Explanation: Overreliance on chemical fertilizers can lead to soil degradation and decreased fertility over time as it disrupts natural soil microbial communities and organic matter.
MCQ 60:
Which of the following is a consequence of overpopulation?
A) Decreased resource consumption
B) Increased waste generation
C) Enhanced ecosystem stability
D) Improved air quality
Answer: B) Increased waste generation
Explanation: Overpopulation leads to higher resource consumption and waste generation, which can strain environmental systems and contribute to pollution and resource depletion.
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