Ecotravel has gone from luxury to the low end, and everywhere in between.
"Increasingly we're seeing a very mainstream customer who's willing to go for the greener option," says Alison Presley, who manages Travelocity's "Travel for Good" program.
Presley says in the two years since she's been on board, the number of "green hotels" offered on the site has grown from 700 to over 3,000.
What constitutes "green?" Presley says Travelocity looks at a variety of factors, like hotels that do not wash towels every day or that replace those little shampoo bottles with a wall dispenser in the shower.