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http://www.esrl.noaa.gov/gmd/hats/publictn/elkins/cfcs.html
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http://www.theozonehole.com/ozonedestruction.htm
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http://environment.nationalgeographic.com/environment/global-warming/ozone-depletion-overview/
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http://www.ingenious.org.uk/Read/TheEnvironment/Pollutionfearingtheunseen/CFC/
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https://www.ec.gc.ca/ozone/default.asp?lang=En&n=D57A0006-1
"Repealed Regulations." Government of Canada, Environment Canada. N.p., 16 Dec. 2015. Web. 09 Nov. 2016.
https://www.ec.gc.ca/lcpe-cepa/eng/regulations/DetailReg.cfm?intReg=15
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https://www.ec.gc.ca/international/default.asp?lang=En&n=AFAC639E-1
"Persistent Organic Pollutants." EPA. N.p., 2009. Web. 9 Nov. 2016.
https://www.epa.gov/international-cooperation/persistent-organic-pollutants-global-issue-global-response
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http://www.freedrinkingwater.com/water_quality/quality1/1-bod-effects-on-water-quality.htm
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http://www.unep.or.jp/ietc/publications/short_series/lakereservoirs-3/1.asp
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