Light bulb daily CO2 emissions

Light bulb daily CO2 emissions

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Credit: ADAM NIEMAN/SCIENCE PHOTO LIBRARY

Caption: Light bulb daily carbon dioxide (CO2) emissions. Illustration comparing the actual amounts of greenhouse gases emitted by powering three types of light bulb for 24 hours as measured in the equivalent (e) volume of CO2 gas. Relative height labels are included (the central column is a cube 18 inches high), with human figures providing a scale. The CO2-equivalent values are (from left): 7-watt light-emitting diode (LED), 0.093 kilograms; 14-watt compact fluorescent lamp (CFL), 0.186 kilograms; and 60-watt incandescent light bulb, 0.798 kilograms. Values calculated using US electricity grid data (eGRID2012 Version 1.0 with Year 2009 Data Released).

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