There is so much hype about ecotourism in the travel industry. What is it actually? Ecotourism Society defines it as responsible travel to natural areas which conserves the environment and improves the welfare of the local people. Nature Awareness and Conservation Club Inc, in the Philippines supports this and here's what they offer for Travel for Less:
http://manila.craigslist.com.ph/eve/1305227296.html
http://manila.craigslist.com.ph/eve/1305227296.html