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。

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Eco-tourism is responsible travel in natural and usually protected area.

生态旅游是指在自然以及通常被保护的区域进行负责任的旅游。

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You can, of course, do a building that's eco-responsible but aesthetically worthless.

CNN: ASIANOW - TIME Asia