Therefore , the activities that alter or endanger the stability of the ecosystem are forbidden .
National Parks are nature areas nearly untransformed by human activity that , based on their landscape , geological or ecosystems possess aesthetic , ecologic , educative or scientific values worth of special protection .
The activities that alter or endanger the stability of the ecosystem are forbidden .
National Parks are nature areas nearly untransformed by human activity that , based on their landscape , geological or ecosystems possess aesthetic , ecologic , educative or scientific values worth of special protection .