Which of the following are ways that humans increase the amount of greenhouse gases in the atmosphere? Check all that apply.

Burning fossil fuels releases carbon dioxide, and deforestation adds carbon dioxide by releasing stored carbon and reducing the number of trees that absorb it. Livestock and agricultural practices can release methane and nitrous oxide; landfills and sewage treatment can also produce methane. The ordinary death of organisms is part of the natural carbon cycle, so it is not generally counted as a human-caused increase in greenhouse gases.

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