- For electricity, kWh (kilowatt-hours) is the unit used to show consumption on your bills.
- For water and natural gas, ccf (hundred cubic feet) is the unit used to show consumption on your bills.
- For steam, consumption is billed in pounds.
- For electricity, natural gas, and steam, data can also be input in kBTU (thousand British Thermal Units), a traditional unit of heat often used in tracking of energy usage.
*CO2e vs CO2: Both of these are used to describe greenhouse gas emissions. CO2¬ is the scientific abbreviation for carbon dioxide, the greenhouse gas produced in the greatest volumes in burning fossil fuels such as coal and gasoline. CO2e stands for “carbon dioxide equivalent”, and includes the emissions of less common greenhouse gases, multiplied by a factor called global warming potential (GWP) to normalize their ability to act as a greenhouse gas to that of carbon dioxide. For example, methane (CH4) has a GWP of 25, meaning it is 25 times as effective as carbon dioxide at reflecting heat back to the Earth. Any numbers reported in CO2e on this website include methane and nitrous oxide (N2O, GWP of 298) in the calculations.