In mountain areas, trekking tourists generate a great deal of waste. Tourists on expedition leavebehind their garbage, oxygen cylinders and even camping equipment. Such practices degrade theenvironment with all the detritus typical of the developed world, in remote areas that have few garbagecollection or disposal facilities.3.3. SewageConstruction of hotels, recreation and other facilities often leads to increased sewage pollution.Wastewater pollutes seas and lakes surrounding tourist attractions, damaging the flora and fauna.Sewage runoff causes serious damage to coral reefs because it contains lots of nutrients and it stimulatesthe growth of algae, which cover the filter-feeding corals, hindering their ability to survive. Changes insalinity and transparency can have wide-ranging impacts on coastal environments. And sewage pollutioncan threaten the health of humans and animals.3.4.Aesthetic PollutionOften tourism fails to integrate its structures with the natural features and indigenous architectural ofthe destination. Large resorts of disparate design may look out of place in a natural environment and mayclash with the indigenous structural design.A lack of land-use planning and building regulations in many destinations has facilitated sprawlingdevelopments along coastlines, valleys and scenic routes. The sprawl includes tourism facilitiesthemselves and supporting infrastructure such as roads, employee housing, parking, service areas, andwaste disposal.
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