- 2 round trip flights / outing
 at 25-30 gallons Avgas / hour or about 60 gallons / trip
- 4.5 persons average = 13.5 gallons / person
- 18.4 lbs CO2 / gallon aviation gas (SOURCE: https://www.eia.gov/environment/emissions/co2_vol_mass.php)
- 248.4 lbs CO2 / passenger
- $0.021 / lb CO2 implies COST FOR OFFSET = $5.21