Non-governmental organisations (NGOs) are campaigning against the destruction of the Gran Chaco. According to ENDEPA, a national organisation of indigenous people, deforestation is not even mainly about timber: “The Indios in Argentina are facing multinational corporations which are massively buying real estate, in Patagonia as well as in the Chaco. Many of these companies are bogus firms with addresses in tax havens. As far as we understand the motives of these companies, they are interested in the natural resources of this country. We are seriously concerned, because great water reserves – above and below the surface – are coming under the control of these corporations.” Under the dry, thorny forest, there is a huge subterranean water reservoir: a part of the Gran Chaco belongs to the Guaraní aquifer, which also passes below Brasil, Paraguay and Bolivia. It is assumed that this aquifer is the second biggest freshwater reserve of the world.