Data on the carbon-intensity of each nation's electricity mix are from the International Energy Agency. The carbon emissions of various fuels are those used by the U.S. Energy Information Administration and the North American nonprofit collaborative, The Climate Registry.

Credits: Design by Stefan Estrada. Illustrations by H2H Graphics & Design. Text by Matthew Lewis, Mason Inman, David LaGesse, Barbara Mulligan, Mary Anne Mulligan, Jeff Smith, Ker Than, and Marianne Lavelle.


Personal Energy Meter

See how you measure up against others, and how choices you make at home and in the way you travel could help to protect the atmosphere.

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Did You Know?

Fourteen nations and Europe account for about 80 percent of world greenhouse gas emissions. See four ways to look at global carbon footprints.

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    See how you measure up, and find out how making simple changes at home can help.

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    How much can you save yourself, and the world, by switching to more efficient bulbs?

Step Up to the Challenge »

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