Nowadays we are fully aware of serious problems our world is facing be it deteriorating natural resources and human activities that have impacts on water, forest, land or even air.
World travel industry, according to UNWTO, also contributes to this problem as it released 1,307 million tones of green house gas to the atmosphere (2006) or 5 percent of the total green house gas emission.
The amount comes from air transportation 40 percent, 32 percent from land transportation, 3 percent from other transportation, 21 percent from hotel and accommodation and 4 percent from tourism activities.
That's the figure from the past 5 years whereas the growth target of travel industry is constantly on the rise.
This means the impact from the tourism industry on the environment would inevitably be increased.