Destruction of nature and habitat loss Development can be a reson for human and animal conflict.And unfortunately some places don't have any cleaning systems in place, and the sewage waters go into the ocean untreated.The cleaning systems have to process a much bigger amount of sewage waters.Increased number of vehicles, higher levels of noise, deforestation and pollution disturb the ecological balance of the region.Construction of new infrastructure (roads, airports) and buildings oftentimes destroys the soil.For example, Langtang Valley in Nepal used to be the 3rd biggest region for trekking after Everest and Annapurna.Poto by Yassine Khalfalli Any development requires some interference with nature.Dependence on tourism Empty temples in Egypt.