Human Impact Study Guide (updated 2025)

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What is a wildlife refuge?

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A wildlife refuge is a protected area designated for the conservation of wildlife and their habitats, allowing species to thrive without human interference.

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How do fossil fuels contribute to global warming?

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Fossil fuels release carbon dioxide and other greenhouse gases when burned, which trap heat in the atmosphere and lead to an increase in average global temperatures.

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What is the significance of using light rays to purify water?

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Using specific wavelengths of light to purify water can effectively kill harmful bacteria, making drinking water safer and improving public health.

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What are two major human activities that impact the Earth's systems?

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Deforestation and urbanization are two significant human activities that alter natural landscapes, affect ecosystems, and contribute to climate change.

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What is an example of species exploitation?

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The poaching of the African Elephant for its ivory tusks is a clear example of species exploitation, leading to significant population declines.

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What is deforestation?

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Deforestation is the large-scale removal of trees from forested areas, often resulting in habitat loss, biodiversity decline, and increased carbon emissions.

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What is urbanization?

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Urbanization is the process of population movement from rural to urban areas, leading to the growth of cities and changes in land use.

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What are greenhouse gases?

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Greenhouse gases are gases in the Earth's atmosphere that trap heat, including carbon dioxide, methane, and nitrous oxide, contributing to the greenhouse effect.

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What is the greenhouse effect?

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The greenhouse effect is the warming of the Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

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What is poaching?

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Poaching is the illegal hunting or capturing of wild animals, often for their valuable parts, such as ivory, fur, or meat.