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a Firefox plug-in that inserts bar charts depicting CO2 emissions data into travel related e-commerce websites. the 1st version visualizes CO2 emissions information to airfare websites such as Orbitz.com, United.com, Delta.com, etc. following versions will work with car directions, car rental, & shipping websites.

[link: therealcosts.com]

see also oil standard price translation & an inconvenient truth infographics.

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