The April bulletin from the AARP has an interesting article called Changing Earth. It consists of a 50 point essay on how the planet Earth is changing. Here are some of the high points:
- Global Warming followed each of the several ice ages starting in the Precambrian more than 600 million years ago.
- By 2100 global temperatures may rise as much as 1o degrees
- Between 1970 and 2010 the mean temperature rose 1.6 degrees and ocean temperatures rose 1.4 degrees and sea levels are predicted to rise 3 feet by 2100
- The ozone hole over Antarctica is the smallest since 2004 and will disappear by 2050
- Average Americans accounted for 17 metric tons of CO2 in 2009 down from 20 metric tons
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