Check out the Vulcan Project out of Purdue University (with funding from NASA and DOE). It’s an attempt to quantify and visually represent U.S. CO2 emissions over time:

Grist relies on the support of generous readers like you to cover the stories that matter most. Thank you for donating.
Secure · Tax deductible · Takes 45 Seconds

Did this article feel meaningful?

Make others like it possible: Give now in under 45 seconds.
Secure · Tax deductible · Takes 45 Seconds
Vulcan Project

Here’s a nifty video introduction:

(via Dot Earth)