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Created with Fabric.js 1.4.5 Greenhouse gas Carbon dioxide Methane Sulfur dioxide Possible solutions to this problem Air pollution Our planet would be as cold as the moon except for the insulating effects of certain gases--called greenhouse gases--such as wate vapor, CO2, methane, and nitrous oxide in the atmosphere (*). The chemical bonds in carbon dioxide molecules sbsorb solar energy as heat radiates from Earth. Global Temperatures It is the main pollutant that iswarming Earth.Though living things emit carbon dioxide whenthey breathe, carbon dioxide is widely considered to be a pollutant when associated with cars, planes,power plants, and other human activities that involve the burning of fossil fuels such as gasolineand natural gas. In the past 150 years, such activities have pumped enough carbon dioxide into the atmosphere to raiseits levels higher than they have beenfor hundreds of thousands of years. it comes from such sources as swamps and gas emitted by livestockand chlorofluo-rocarbons (CFCs), which wereused in refrigerants and aerosol propellants until they were banned because of their deteriorating effect on Earth's ozone layer. It is a component of smog. Sulfur dioxide and closely related chemicals are known primarily as a cause of acid rain. But they also reflect light when released in the atmosphere, which keeps sunlight out and causes Earth to cool. Volcanic eruptions can spew massive amounts of sulfur dioxide into the atmosphere, sometimes causing cooling that lasts for years. In fact, volcanoes used to be the main source of atmospheric sulfur dioxide. Urban Farming
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