Global Warming and Ozone Depletion Table of Contents Slides 3-8 Global Warming....... Ozone Depletion...... Slides 9-14 What Causes Global Warming?
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- Global warming is the rise in average global temperature due to human activities, such as, the emissions of greenhouse gas pollution produced by the burning of fossil fuels and land-use changes like deforestation. Scientists predict that higher temperatures will probably be accompanied by an increase in extreme weather events like flooding and drought, as well as a rise in the global sea level.
- Light from the sun passes through the Earth's atmosphere and heats its surface. The Earth's surface then gives off heat, some of which is trapped in its atmosphere by a blanket of greenhouse gases rather than escaping into space, keeping the Earth warmer than it otherwise would be. Most of this greenhouse effect is natural, maintaining the Earth's average temperature at about 60 degrees Fahrenheit (15 degrees Celsius). Without the natural greenhouse effect, the Earth's average temperature would be closer to 0degrees Fahrenheit (-18 degrees Celsius).
- Gases such as carbon dioxide, methane, nitrous oxide, and refrigerants create a greenhouse effect by trapping heat in the lower atmosphere. This makes the Earth warmer because the sun’s rays are allowed into the lower atmosphere but the heat from these rays isn’t able to escape.
- Global warming is an increase in the average temperature of the earth's atmosphere, especially a sustained increase sufficient to cause climatic change so therefore it has and is occurring in the area of Windsor.
- Recent examples of major occurrence in global warming were in Europe. In 2003 Europe received a massive heat wave. Scientists believed that the conclusion to this result is that climate change is now doubling the risk of major heat waves around the world.
-Also, another example of global warming is that in the Arctic region, the ice is starting to melt rather quickly because the global warming is allowing the sun to give hotter rays onto the earth.
-Like terrorism, global warming knows no boundaries. It can strike anywhere, in any form. It is not just a problem for the future. Global warming is already upon us.
Ozone depletion is presented throughout the whole stratosphere so therefore it has occurred in the area of Windsor.
Recent example of its occurrence is in the arctic area. Severe depletion of the Arctic area was first discovered in the 1980’s. Arctic depletion is seasonal mainly occurring in the late winter and early spring. This resulted into the ozone hole in the sky.
- The ozone helps get rid of the earth’s pollution but lately it has been letting the sun rays come onto the earth, causing UV radiation
- The Montreal Protocol on Substances That Deplete the Ozone Layer is a landmark international agreement designed to protect the stratospheric ozone layer. The treaty was originally signed in 1987 and substantially amended in 1990 and 1992. The Montreal Protocol stipulates that the production and consumption of compounds that deplete ozone in the stratosphere are to be phased out.