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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 »

Positive effects of global warming include fewer deaths in winter due to cold weather, lower costs of energy for heating homes and other buildings, and better agricultural production. Additionally, warmer temperatures fa... More »

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 »

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Global warming occurs when the levels of greenhouse gases in the atmosphere increase, causing more solar energy to be trapped in the climate system. Human activity results in the emission of carbon dioxide and methane, w... More »

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 »

Carbon dioxide contributes significantly to global warming by entering the atmosphere and waterways through many human activities, such as farming, industrial operations and changes in land use, primarily to agricultural... More »

Climate change stems from numerous sources, including accumulation of greenhouse gases in the atmosphere, the burning of coal and fossil fuels and even some natural Earth activities such as volcanic eruptions. Some clima... More »