Lec 11- global climate change and human health last 100 000 years was the ice age glaciation period. Climate changes all the time since earths history. 1961-2003 inc in these gases seen photosynthetics seasonal effect winter -> summer. But still contaminates) rice produced by planted seeds in soil after at some vegetation stay that raising large number of livestock (cow manure) in flat soil carbon dioxide stays when soil dry it will be released (bioorganic. Largest emitters of carbon dioxide china was 3/4th place but now is in 2nd (industrial revolution usage of coal: canada is only 0. 5 of works pop so 23% is v. sig. Reach stratosphere and breakdown chlorine is released breaks down ozone some becomes ozone known as ozone hole: most of the radiation is filtered, chlorine and fluorine used in chem. Refrigerators industry: uva and uvb, uvb is bab -> v. harmful.