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Created with Fabric.js 1.4.5 Greenhouse Gases by: Ashley Ruiz Carbon Dioxide Carbon dioxide is the primary greenhouse gas emitted through human activities. Carbon dioxide is naturally present in the atmosphere as part of the Earth's carbon cycle the natural circulation of carbon among the atmosphere, oceans, soil, plants, and animals. Human activities are altering the carbon cycle both by adding more CO2 to the atmosphere and by influencing the ability of natural sinks, like forests, to remove CO2 from the atmosphere. Methane Methane is the second most prevalent greenhouse gas emitted in the United States from human activities. Methane is emitted by natural sources such as wetlands, as well as human activities such as leakage from natural gas systems and the raising of livestock. Methane's lifetime in the atmosphere is much shorter than carbon dioxide (CO2), but CH4 is more efficient at trapping radiation than CO2. Water Vapor The higher concentration of water vapor is then able to absorb more thermal IR energy radiated from the Earth, thus further warming the atmosphere. The warmer atmosphere can then hold more water vapor and so on and so on. Nitrous Dioxide It produces exhilaration or anesthesia when inhaled and is used as an anesthetic and as an aerosol propellant. Ozone Ozone in the troposphere has a radiative forcing effect roughly 1,000 times as strong as carbon dioxide. Ozone is a short-lived greenhouse gas, which decays in the atmosphere much more quickly than carbon dioxide.
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