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Reacting to Global CrisesHistorical examples
1970’s – Acid RainCrisis: Slight increases in the acidity of rain
were causing damage to vegetation, aquatic life, and structural damage to buildings, etc …
Cause: primarily due to SOx emissions from burning high-sulfur fossil fuels
Remedy: Cap and Trade law limiting sulfur emissions (diesel pumps are still labeled “low sulfur”)
Acid Rain affects plant life
Acid Rain affects aquatic life
Acid Rainaffects us
1980’s – The hole in the ozone layerCrisis: Ozone levels were decreasing in the
upper atmosphere (with “holes” developing over the Earth’s poles). Since Ozone filters UV light, increased skin cancers and decreased crop health were anticipated.
Cause: CFC’s from aerosol sprays, refrigerators and AC’s, and microchip manufacture released into atmosphere
Remedy: Montreal Protocol (1987); in US Law limiting use of CFC’s, first in aerosols, then in refrig/AC
A hole in the Ozone Layer
Protection by the Ozone Layer
We had solid evidence before we acted
One of the culprits
2000’s – Global WarmingCrisis: The Earth’s climate is warming up
Cause: CO2 from fossil fuels Greenhouse Effect ???
Remedy: Kyoto Protocol (1998), not signed by US; Reduce our carbon footprint – “Ten Things” list from liner notes to AIT, Increased CAFE stds, Cap and Trade law limiting industrial CO2 emissions
This can’t be right?
Polar bear revenge
Not controversial
The culprit?
The solution?