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Which natural cycle involves changes in Earth’s orbit and ti…

Which natural cycle involves changes in Earth’s orbit and tilt?

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Which country is projected to become the 4th largest by 2050…

Which country is projected to become the 4th largest by 2050 due to high fertility rates?

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At least 1 billion people live in crowded, unsanitary slums…

At least 1 billion people live in crowded, unsanitary slums worldwide

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The Montreal Protocol was designed to phase out substances t…

The Montreal Protocol was designed to phase out substances that deplete the ozone layer, such as CFCs.

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What is the main advantage of natural gas over coal?

What is the main advantage of natural gas over coal?

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Habitat protection is often considered more effective than s…

Habitat protection is often considered more effective than species-by-species protection.

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Which of the following gases is the most abundant contributo…

Which of the following gases is the most abundant contributor to the greenhouse effect?

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Which biome occurs where rainfall exceeds 200 cm per year an…

Which biome occurs where rainfall exceeds 200 cm per year and temperatures are warm year-round?

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Recycling aluminum uses about 1/20 of the energy required to…

Recycling aluminum uses about 1/20 of the energy required to produce new aluminum.

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Which gas has increased due to human activity, contributing…

Which gas has increased due to human activity, contributing to climate change?

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