According to U.S. EPA, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2004,
1 therm of natural gas burnt produces 11.7 lbs. of carbon dioxide emissions.
Therefore, the Carbon Coefficient for natural gas is:
117 pounds of CO2 per million BTU, or 0.12 pounds per cubic foot of gas.
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Approximately 0.0053 tons of CO2 emissions are produced per therm of natural gas when it is burned.
On average, burning 1 gigajoule (GJ) of natural gas produces approximately 55-60 metric tons of carbon dioxide (CO2) emissions.
In 1992, around 70 million tons of sulfur dioxide (SO2) emissions were produced globally.
Termites produce around 11-30 million metric tons of methane annually, making them one of the largest natural sources of methane emissions.
The average CO2 emissions per car per year is around 4.6 metric tons.
This is the total emissions of carbon (from CO2 and CH4), expressed in tons, for a country in one year.