Guilt-free flying has arrived at Aspen-Pitkin County Airport, where all fuel sold is now offset with money spent for carbon-reduction projects around the world.

Guilt-free flying has arrived at Aspen-Pitkin County Airport, where all fuel sold is now offset with money spent for carbon-reduction projects around the world.
Some of us fly—a lot. But is the carbon footprint really that broad? No easy answer here, but you might find a few things that surprise you.