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What is solar energy?

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Solar energy is energy from the sun that is converted into thermal or electrical energy using photovoltaic cells.

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What percentage of the world's electricity is produced by coal?

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Coal is used to produce approximately 30% of the world's electricity.

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What is geothermal energy?

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Geothermal energy is the heat energy generated and stored in the Earth, which can be used to heat and cool buildings.

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How is hydroelectric power generated?

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Hydroelectric power is generated by dams on rivers, where flowing water turns a turbine to generate electricity.

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What describes wind power generation?

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Wind power generation involves using turbines turned by air currents to generate electricity.

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Define renewable resources.

Back

Renewable resources are natural resources that can be replenished naturally over time, such as solar, wind, and geothermal energy.

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Define nonrenewable resources.

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Nonrenewable resources are natural resources that cannot be replenished in a short period of time, such as coal, oil, and natural gas.

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What is the main advantage of using renewable resources?

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The main advantage of using renewable resources is that they are sustainable and have a lower environmental impact compared to nonrenewable resources.

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What is the environmental impact of coal mining?

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Coal mining can lead to habitat destruction, air and water pollution, and contributes to greenhouse gas emissions.

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What is the role of photovoltaic cells?

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Photovoltaic cells convert sunlight directly into electricity.