Sukh+M

=TOPIC 5: Describe how climate can be influenced by human activities (eg. Greenhouse gasses, depletion of ozone layer) =

=Carbon Dioxide Emissions= = = Of the many things that contribute to global climate change, CO2 emissions arguably have the most profound impact. The burning of fossil fuels contributes to the excessive amount of CO2 released in the atmosphere. The amount of CO2 released into the atmosphere in millions of metric tons has gone steadily up since the industrial revolution. The greenhouse effect is amplified and global temperatures rise. A temperature increase of 10 degrees Celsius is the worst case scenario predicted to occur if global CO2 emissions are not reduced. CO2 is released by many different human activities.



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=Deforestation= The chopping down of trees requires heavy machinery to be used. The machines release large amounts of carbon dioxide into the air. Not only that, since there are less trees, less carbon dioxide can be absorbed from the air by vegetation. This results in more carbon dioxide and higher temperatures.

=Cars= "**CO2 emissions from U.S. cars & trucks ** totaled 314 million metric tons in 2002. That's as much as would be released from burning all the coal in a train 50,000 miles long -- enough to circle around the world, twice."



=Air Travel= Air travel is the fastest mode of transportation as well as the safest. Unfortunately, it's also very polluting. " On a New York-to-Denver flight, a commercial jet would generate 840 to 1,660 pounds of carbon dioxide per passenger. That's about what an SUV generates in a month." - []





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