books.google.be - All forms of tourism have impacts on the natural environment. The impacts of ecotourism tend to be concentrated in areas of the highest conservation value, hence the need to manage and minimize these. This comprehensive text considers the impact of off-road vehicles, recreational boats and activities...http://books.google.be/books/about/Environmental_Impacts_of_Ecotourism.html?hl=nl&id=wueZG01A9YoC&utm_source=gb-gplus-shareEnvironmental Impacts of Ecotourism
