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Climate Change

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Climate Change

  1. 1. Greenhouse Gases
  2. 2. What are Greenhouse Gases? <ul><li>Gases in the atmosphere that contribute to the “Greenhouse Effect”. This is when solar radiation that is absorbed by the Earth is reradiated at a longer wavelength and trapped in the atmosphere by these gases. </li></ul><ul><li>These gases are Carbon Dioxide, Methane, Nitrous Oxide. </li></ul>
  3. 3. Carbon Dioxide <ul><li>Carbon Dioxide is the most important greenhouse gas mainly due to combustion through the burning of fossil fuels. </li></ul><ul><li>Carbon becomes carbon dioxide when it is released as a gas into the atmosphere through a process called respiration. </li></ul><ul><li>Respiration involves the breakdown of carbon based molecules into carbon dioxide. </li></ul>
  4. 5. What caused the Increase? <ul><li>Industrial Revolution (1805-1918) </li></ul><ul><li>The burning of fossil fuels was heavily relied on during this time period. </li></ul><ul><li>Also the dependence of automobiles in the later half of the 21 st century. </li></ul>
  5. 6. Methane <ul><li>Methane is a gas that is produced naturally and by human means. </li></ul><ul><li>Methane has a global warming potential of 23 which means that 1 kilogram of Methane has the same effect as 23 kg of carbon dioxide over a 100 year period. </li></ul>
  6. 7. Sources of Methane (Natural) <ul><li>Naturally produced in areas where soils are waterlogged and oxygen levels are low or near zero. A group of microorganisms called methanogens produce methane as they respire carbon dioxide. </li></ul><ul><li>Cows produce 300-400lbs of methane each year and there are 1 billion cows on Earth! </li></ul>
  7. 8. Sources of Methane (Human Made) <ul><li>Main human made sources of methane come from losses during the extraction of oil, coal, and gas. </li></ul><ul><li>Other sources are waste treatment facilities, rice cultivation and biomass burning. </li></ul>
  8. 9. Positives of Methane <ul><li>Methane can be used as an energy source. </li></ul><ul><li>Many landfills are converting methane to energy since the main byproduct is methane. </li></ul><ul><li>Breweries are also using the methane created during the fermentation process and converting it to energy to run their machinery. </li></ul>

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