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.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
NATS 101 Lecture 34Climate Change (cont’d)
Hansen et al., 2006
CO2 emissions in different regions in 2000 in terms of emissions per capita (height of each block); population (width of each block); and total emissions (product of population and emissions per capita = area of block).
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