Some people consider the terms 'ecotourism' and 'sustainable tourism' to be an oxymoron- you can't travel in a away that helps the environment. First of all, you have to get from one place to another which almost always means a plane, which burns fossil fuels. Secondly, no matter how much you try your impact will still be negative. But I think that's taking away from the point. If you've decided to travel, you can still do a lot to reduce your impact and at least in some aspects, even make a positive difference. As long as these objectives are fulfilled I'd dare say that ecotourism is successful: