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1·Many countries around the world have discovered that their natural environment is a valuable ecotour asset.

世界上许多国家已经发现，他们所处的自然环境，是珍贵的生态旅游资产。

2·Ecotour Directory – This site currently lists 95 different eco holiday and responsible travel options, searchable by continent.

“生态旅游目录”（Ecotour Directory）—— 这个网站列举了95个不同的生态旅游假期和负责任旅游的选择，按照大洲来进行检索。