Electricity
We calculate emissions from electricity generation based off figures from the EPA’s eGRID emission factors based on 2012 data published in 2015. On average, electricity sources emit 1.222lbs CO2 per kWh (0.0005925 metric tons CO2 per kWh). State CO2 emissions per kWh may vary greatly in accordance with the amount of clean energy in the energy supply (Vermont: 0.0055 lbs/kWh; North Dakota: 2.0685 lbs/kWh). (Source: EPA eGRID Summary Tables and Data Files)
Natural Gas
There are 0.005 metric tonnes of CO2 per 1 therm of natural gas. (Source: EPA Clean Energy)
US avg.: In 2014, 67.2 million households used natural gas. Collectively, they used 5.1 billion cubic feet of natural gas annually, or 730.84 CCF (approximately 748.38 therms) per household or 283.27 CCF (approximately 290.07 therms) per person per household using natural gas. (Source: Energy Information Agency, US Census Bureau.)
Heating Oil
There are 10.15 kg of CO2 per gallon of home heating oil. (Source: US DOE 1605(b) Voluntary Reporting of Greenhouse Gases Program.)
US average: In 2014, 3.8 billion gallons of heating oil were consumed by 7.7 million households resulting in an average of 493.9 gallons per household or 197.56 gallons per person per household using heating oil. (Source: DOE EIA Fuel Oil and Kerosene Sales 2014)