GC 170a1 1st Edition Lecture 13 Outline of Last Lecture Ozone o Where is the ozone layer o How is ozone produced o How does ozone protect us from UV radiation CFC s o What are they o How do they destroy the ozone Ozone discovery Outline of Current Lecture Political side of Ozone o Government steps after discovery Montreal Protocol 1987 o Limiting CFC production o CFC emission today o Why was it remarkable What About CO2 o Fossil Fuels o Alternatives Current Lecture The political side of the ozone The first government steps o In 1978 the US and a few other governments initiated a ban on non essential CFC technology aerosol cans o These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o In the 1970 s significant funding was made available to study the problem further Contrary evidence presented by the chemical industry focused on the lower atmosphere couldn t provide any evidence of the stratosphere o The time period of the 1970 s to mid 1980 s was called the Ozone Wars Montreal Protocol 1987 o Signed by all major industrial nations Placed strict limits on CFC production Additional revisions 1990 1992 were made as more evidence was released o What happened with this The chemical industry developed alternatives HCFC s and there is a high rate of compliance o Today there are basically zero emissions of CFC s Ozone hole seems to have stabilized not growing rapidly anymore Recovery may have started May take another 40 50 years for full ozone hole recovery o It was a remarkable thing because The ban on CFC s Montreal Protocol 1987 came within 15 years of the first R and M hypothesis of ozone depletion Very quick decision on their part Why is it taking so long for government policy to place strict limits on CO2 production o The fossil fuel industry is much larger than the chemical industry o Much greater reliance on fossil fuels in our daily lives o Alternatives are not as readily available or easy to adapt to
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