Description

Using data from http://css.umich.edu/factsheets/carbon-footprint-factsheet, CO2 generated averages 0.39 lbs / mile per person.

4784 mile flight from Tokyo to Seattle, 9568 miles round trip, = 3,731.5 lbs CO2 per person.

At $0.021 per pound CO2, round trip carbon cost = $78.36