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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 are greenhouse gases?

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Greenhouse gases are gases that trap heat in the atmosphere, including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).

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What is the main cause of the greenhouse effect?

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The main cause of the greenhouse effect is the increased use of fossil fuels, which releases carbon dioxide and other greenhouse gases into the atmosphere.

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What is acid rain?

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Acid rain is precipitation that is significantly more acidic than normal, primarily caused by the emission of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere.

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What are the primary pollutants that cause acid rain?

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The primary pollutants that cause acid rain are sulfur dioxide (SO2) and nitrogen oxides (NOx).

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What is point-source pollution?

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Point-source pollution is pollution that comes from a single, identifiable source, such as a factory or sewage treatment plant.

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What is an example of point-source pollution?

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An example of point-source pollution is a factory dumping waste materials directly into a river.

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What is the largest source of freshwater on Earth?

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The largest source of freshwater on Earth is glaciers and ice caps.

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What percentage of Earth's freshwater is stored in glaciers and ice caps?

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About 68.7% of Earth's freshwater is stored in glaciers and ice caps.

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What is the Kyoto Protocol?

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The Kyoto Protocol is an international treaty that commits its parties to reduce greenhouse gas emissions, based on the premise that global warming exists and human-made CO2 emissions have caused it.