So we all know that air travel is a huge factor in greenhouse gas emissions:
For a long trip, like a transatlantic flight on an average-size plane, each passenger is responsible for sending .39 pounds of CO2 per mile into the atmosphere, according to the World Resources Institute’s Greenhouse Gas Protocol Initiative. By that measure, flying direct from Denver to London and back puts about 3,600 pounds of CO2 into the atmosphere, equivalent to driving a Toyota Prius hybrid 10,000 miles.
But what are the alternatives?