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’so What are they?o How do they destroy the ozone?- Ozone discoveryOutline of Current Lecture - Political side of Ozoneo Government steps after discovery- Montreal Protocol 1987o Limiting CFC productiono CFC emission today?o Why was it remarkable?- What About CO2?o Fossil Fuelso AlternativesCurrent LectureThe political side of the ozone- The first government stepso In 1978, the US and a few other governments initiated a ban on non-essential CFC technology (aerosol cans) oThese 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 stratosphereo 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 complianceo 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 recoveryo 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
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