Carbon footprint?


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Carbon Footprint Your answer is coal | 4.8 kgCO_2 (kilograms of carbon dioxide) natural gas | 3 kgCO_2 (kilograms of carbon dioxide) petroleum | 4.5 kgCO_2 (kilograms of carbon dioxide) (estimate based on 1999 DOE data). Src: Wolfram|Alpha

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