Known for featuring real advice from real travelers, the travel company TripAdvisor has conducted an ecotourism survey that found many people are willing spend more to be green.

The new survey of more than 1,000 travelers worldwide found that 38 percent of respondents said environmentally-friendly tourism is a consideration when traveling. Sixty-six percent believe　environmentally-friendly measures in travel are making a difference.

"A significant number of TripAdvisor survey respondents are environmentally-conscious, which sends a message to the travel industry to ratchet up eco-friendly offerings," said Michele Perry, director of communications for TripAdvisor.

Thirty-four percent of travelers surveyed would pay more to stay at an environmentally-friendly hotel. Twenty-five percent would be willing to pay a five to 10 percent premium, and 12 percent would pay a 10 to 20 percent premium.

When asked what qualities are most important to making a hotel eco-friendly, conserving energy ranked number one, followed by conserving water and using recycled paper. Seventy-eight percent of travelers said they decline to have their sheets and towels changed to save water and energy, when provided that option by hoteliers.

Eleven percent of those polled have taken an ecotourism trip, and 25 percent are considering booking ecotourism travel. Twenty-four percent of respondents believe that air travel should be avoided, when possible, to help preserve the environment. Thirty-eight percent of travelers surveyed would pay more to take an eco-friendly flight and 26 percent would pay a 5-10 percent premium.