ravel in associated with the natural-green-'back to nature' movement is surprisingly problematic.  We firmly believe that humans need to reconnect with nature in order to attain a more healthy and balanced life.  However, when the travel becomes especially exotic or excessive (e.g., climbing Mt Everest), the costs to the environment may indeed be prohibitive.  An especially insightful discussion of the costs of 'enviro-tourism' is provided from Wikipedia (and is open to any and all use).

Ecotourism (also known as ecological tourism) is travel to fragile, pristine, and usually protected areas that strives to be low impact and (often) small scale. It helps educate the traveler; provides funds for conservation; directly benefits the economic development and political empowerment of local communities; and fosters respect for different cultures and for human rights.^[1] As defined by the co-founder of the Center for Responsible Travel, Martha Honey, Ph.D., in her book Ecotourism and Sustainable Development, Second Edition: Who Owns Paradise?. Most serious studies of ecotourism including several university programs now use this as the working definition.^[2]

Ecotourism appeals to ecologically and socially conscious individuals. Generally speaking, it focuses on volunteering, personal growth and learning new ways to live on the planet. It typically involves travel to destinations where flora, fauna, and cultural heritage are the primary attractions. Ecotourism is a conceptual experience, enriching those who delve into researching and understanding the environment around them. It gives us insight into our impacts as human beings and also a greater appreciation of our own natural habitats.

Responsible ecotourism includes programs that minimize the negative aspects of conventional tourism on the environment and enhance the cultural integrity of local people. Therefore, in addition to evaluating environmental and cultural factors, an integral part of ecotourism is the promotion of recycling, energy efficiency, water conservation and creation of economic opportunities for the local communities.^[3]  (To read the Wiki article in its entirety, go to:  http://en.wikipedia.org/wiki/Eco_tourism