Ecotourism is commonly regarded as low impact ( 影响)travel to undisturbed places .It is different from traditional tourism because it allows the traveler to become 4 1       (educate )about the areas -both in terms of geographical conditions and cultural characteristics, and often provides money for conservation and benefits the  4 2      (develop)of the local areas.

Ecotourism has 4 3       (it) origin with the environmental movement of the 1970s. It was not widely accepted as a travel concept 4 4        the late 1980s. During that time,increasing environmental awareness made it desirable.

Due to 4 5      growing popularity of environmentally-related and adventure travel,various types 4 6         trips are now being classified as ecotourism. Actually, a true eco-friendlytrip must meet thefollowing principles:

  Minimize the impact of 4 7        (visit) the place.

        Build respect for and awareness of the environment and cultural practices.

        Provide 4 8         (finance)aid and other benefits for local peoples.

        Make sure that the tourism provides positive experiences for both the visitors and the hosts.

Komodo National Park,officially recognized in 1980,is popular for ecotourism because of its unique biodiversity. 4 9          (activity)there range from whale watching to

hiking ( 远足 )and accommodations aim 5 0        (have )a low impact on the natural environment.