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.
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