How We Calculate Flight Emissions

Carbonfriendly.com uses only credible, published sources for the information required to calculate carbon emissions. Considering the many ways that we emit CO2, different sources are required to complete the relevant calculations. We use sources such as the Energy Information Agency (www.eia.doe.gov), the Environmental Protection Agency (www.EPA.gov), the GHG Protocol (www.ghgprotocol.org) and other sources.

Household

• Energy – Energy calculations are taken from the EIA. Our calculations use a North American average. By taking the overall energy used in the residential sector and dividing by the number of individual residents, we come to a regional average per unit of energy.
• Waste/Recycling –According to the EIA, we are responsible for 462.72 kg of waste per year per person. Through recycling we can reduce the environment impact of this waste. Based on your level of recycling, your carbon footprint is reduced.
  

Sources:

• Energy Information Agency – www.eia.doe.gov
  

Vehicles

• Vehicles – Data for vehicle emissions was taken from data supplied by the EPA and its’ website, www.fueleconomy.gov. The data used is specific to the year, make and model of the individual vehicles. This gives an accurate representation of the emission levels of your vehicles and your driving patterns.
• Buses – data was collected from the UK’s National Energy Foundation.
• Trains – Calculations for train travel is based on data collected from the EPA.

Sources:

• Environmental Protection Agency – www.epa.gov
• EPA’s Fuel Economy website – www.fueleconomy.gov
• Nation Energy Foundation – nef.org.uk

Air Travel

• Flights – Depending on how long your flight is, the amount of CO2 emitted per unit of distance changes. Short haul flights emit the most CO2 on average because of the large amounts of fuel used to take off. EPA data was used for air travel calculations.

Sources:

• Environmental Protection Agency – www.epa.gov

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In 2006 the journal "Science" published a study suggesting that by the end of the century, the world could be locked in to an eventual rise in sea level of as much as 20 ft.