Global warming is caused by increased levels of carbon dioxide and other greenhouse gases in the atmosphere. This increase is the result of human activity, such as the burning of coal to produce energy and the deforestat... More » Science Earth Science

The greenhouse effect is easily explained to kids by comparing Earth to a greenhouse full of plants. The glass of a greenhouse traps heat and allows the plants inside to stay warm all year long, while Earth's atmosphere ... More » Science Earth Science Atmosphere

The National Wildlife Federation explains that global warming is thought to be caused by the greenhouse effect, which is the result of certain gases in the atmosphere trapping the heat of the sun and preventing it from r... More » Science Environmental Science Human Impact
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Global warming refers to the gradual increase in the temperature of the Earth's surface, atmosphere and oceans as a result of greenhouse gases. Carbon monoxide emissions created by deforestation and burning fossil fuels ... More » Science Environmental Science Human Impact

Several greenhouse gases are present in Earth's atmosphere, notably carbon dioxide, methane, nitrous oxide and various fluorinated gases. Each of these compounds absorbs light at its own set of frequencies, so together t... More » Science Environmental Science Pollution

Global warming results primarily from human activities that cause an increase in the amount of greenhouse gases in the atmosphere, which in turn compromise the atmosphere's functional capacities, including regulating tem... More » Science Earth Science

One benefit of hydropower, or hydroelectricity, is that it is a green source of energy, meaning it does not create any pollutants or greenhouse gases, which cause global warming and environmental change. It is also renew... More » Science Environmental Science Natural Resources