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350 Is The Upper Limit
"If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on earth is adapted... CO2 will need to be reduced from its current 385 ppm to at most 350 ppm."
Jim Hansen, NASA

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Astrotour – Planets

What can you do with this?

I really don’t know. But it’s fascinating to watch the planets sail around the sun, for some reason I can’t describe.

Click here to watch it in action.

AstroTour

Thanks to TheBigPicture for the pointer.

Personal note – Donna: I cannot find your email address. Please send me an email and we’ll try to fix the problems you’re having with your pc. Thanks.