Unformatted text preview: atmosphere. 4. a) about 30% b) Determined by ice cores and direct atmospheric measurements c) Deforestation and overall human occurrences 6. a) About a little over a century is when we can make accurate measurements. b) Because weather stations near cities will record higher temperatures because of the abundance of human activity. Sea water temperature also has not been measured accurately in the beginning of the 1900’s. 7. Although the burning of coal was said to cool the earth during the time period of 1940-1970. But coal burning also releases CO , Whish is a greenhouse gas which in the long run will continue to be an agent in heating our overall earth’s temperature....
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- Spring '07
- Global Warming, Greenhouse gas, anthropogenic greenhouse gases, Anthropogenic Greenhouse Gasses, human induced greenhouse