SY25 AICE Environmental Management Semester Exam Review

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What is the dependency ratio?

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The dependency ratio is a measure that compares the number of dependents (people younger than 15 or older than 64) to the working-age population (ages 15-64). It indicates the pressure on the productive population.

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How does an ageing population affect the economy?

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An ageing population can reduce economic growth by decreasing the availability of skilled workers, as more individuals retire and fewer young people enter the workforce.

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What is the impact of a growing elderly population on the dependency ratio?

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A growing elderly population increases the dependency ratio, as there are more dependents requiring support from the working-age population.

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What are the benefits of reintroducing captive-bred animals into the wild?

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Reintroducing captive-bred animals helps restore population numbers and biodiversity in ecosystems, contributing to ecological balance.

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How does deforestation in tropical rainforests contribute to climate change?

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Deforestation contributes to climate change by increasing carbon dioxide levels in the atmosphere, as trees that absorb CO2 are removed.

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What is the relationship between migration rates and dependency ratios?

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Higher migration rates can potentially lower dependency ratios if migrants are primarily of working age, thus increasing the labor force.

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What are the consequences of increasing birth rates on the dependency ratio?

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Increasing birth rates can raise the dependency ratio, as there will be more children who depend on the working-age population for support.

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How does rising life expectancy affect the economy?

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Rising life expectancy can strain economic resources, as more elderly individuals require healthcare and social support, potentially reducing funds available for other sectors.

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What role do tropical rainforests play in regulating climate?

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Tropical rainforests play a crucial role in regulating climate by absorbing carbon dioxide, producing oxygen, and maintaining local and global weather patterns.

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What is biodiversity, and why is it important?

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Biodiversity refers to the variety of life in a particular habitat or ecosystem. It is important for ecosystem resilience, providing resources for food, medicine, and maintaining ecological balance.