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Climate Change aka Global Warming

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Climate Change aka Global Warming

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    1. Climate Change aka Global Warming

    2. Objectives Definition of greenhouse effect What are the greenhouse gases? What is the ozone layer? How is this different then climate change?

    3. Greenhouse Effect What is the greenhouse effect? How is the greenhouse effect different then the ozone layer? .

    4. Greenhouse Effect

    5. Definition of greenhouse effect The greenhouse effect is the rise in temperature that the Earth experiences. The reason for the rise in temperature is because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun.

    6. Where do greenhouse gases come from? Gas and diesel motor vehicles produce CO2, N2O and hydrocarbons. Power stations and other industries that burn fossil fuels release CO2 and N2O. Domestic heating appliances that burn fossil fuels, two- and four-stroke lawnmowers, backyard incinerators and barbecues all produce CO2. Livestock, landfills and waste water treatment facilities produce methane. Agricultural land use and some industrial processes increase nitrous oxides levels.

    7. Continue: Definition of greenhouse effect Without these gases, heat would escape back into space and Earth’s average temperature would be about 60şF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.

    8. Ozone Layer

    9. What is the ozone layer The ozone layer forms a thin shield in the sky. It protects life on Earth from the sun's ultraviolet (UV) rays. I In the 1980s, scientists began finding clues that the ozone layer was being depleted. This allows more UV radiation to reach the Earth's surface, leading to higher skin cancer rates and eye damage

    10. What caused the ozone layer to be depleted? Chlorofluorocarbons (CFCs) were used a lot in industry and elsewhere to keep things cold, make foam, and soaps. Strong winds carry CFCs into the stratosphere. This can take two to five years. When CFCs break down in the stratosphere, they release chlorine. Each chlorine atom attacks ozone by joining with and breaking apart as many as 100,000 ozone molecules during the time it is in the stratosphere. Other ozone eating chemicals are pesticides such as methyl bromide, halons used in fire extinguishers, and methyl chloroform used in businesses.

    11. Ozone Layer Hole

    12. Making Predictions What do you predict will happen if greenhouse gases are emitted at the same rate as today.

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