NATS 101 Lecture 34 Climate Change (cont’d). The 6th Mass Species Extinction?. Holocene Extinction: A 1998 survey by the American Museum of Natural History found that 70\% of biologists view the present era as part of a mass extinction event, the fastest to have ever occurred.
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Hansen et al., 2006
Source: M. Grubb, http://www.eia.doe.gov/iea/
The vast emissions of CO2 from energy use result from three factors:
We presently import ~10 million barrels of oil per day
At ~$100/barrel,$1B leaves the U.S. each day
Presently $10B/month = $330M/day in direct military
Others estimate $720M/day in long term costs
with no end in sight
a major new climate observing system or
a new mission to Mars
Four (?) coupled issues:
Is there a Common solution?
The U.S. should become the world leader in developing alternative energy sources.
Algae may be the long term biofuel of the future.
See for example: http://www.oilgae.com/
In1931, Thomas Edison said: “I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that.”
76°F in summer, 66°F in winter
Bicycles, Walking, Public Transportation
Carpool, Combine Errands, Lighter Loads, Slow Down
Use Fuel Efficient or Hybrid Vehicles
Arizona population projected
to double by 2030
Photo: J. Overpeck
Sustainable Management of an Ever-Changing Planet