The entire southern half of the district is designated as the
Ngorongoro Conservation Area (NCA) which is governed by the Ngorongoro Conservation Area Authority (NCAA). The conservation area is the only one of its kind in Tanzania with all other of the country's protected areas designated as game reserves and national parks. The NCAA uniquely allows human habitation within the protected area, but places restrictions on land-use in the NCA, including cultivation and livestock grazing. While watering of cattle is permitted, human habitation and livestock grazing are forbidden in the Ngorongoro Crater. Within the district are the
Ngorongoro Crater and active volcano
Ol Doinyo Lengai. The district plays host to parts of the
wildebeest migration. While not part of the park, as such, much of the district is within the same
Serengeti-
Mara Ecosystem, which is defined by the limits of the annual wildlife migration. The dominant ethnic group in the district are the
Maasai people.
Threats to the conservation area The most major present challenges in the NCA, which occupies 59% of the district's total land area, include high demands for natural resources and modernity from a growing resident human population, as well as the need to promote and manage tourism. The estimated 93,000
pastoralists that today reside within NCA are roughly five times the amount that existed when the land was listed (1979). Emerging houses and settlements have visible consequences. Although small-scale agriculture is currently prohibited, communities are increasingly seeking the return of subsidence crop cultivation to achieve food self-sufficiency, heightening tensions between residents and conservation organizations. In addition, around 300,000 domestic animals coexist with wildlife on NCA property. The area's resident pastoralist population has gradually expanded from roughly 8,700 in 1966 to 20,000 at the time of World Heritage listing (1979) to 93,136 inhabitants in 2017. The population is expected to grow to 161,000 people by 2027. This population growth has a variety of consequences, including increased infrastructure, grazing grounds, human-wildlife conflicts, and land use disputes. The site's scenic values are being preserved. However, it is evident that housing and other infrastructure linked with the rising pastoralist population may damage the values. Traditional building materials and techniques (based on locally accessible natural materials) are rapidly giving way to the use of imported materials (e.g., cement and corrugated iron) and the use of hefty poles from local forests, which is unsustainable. Although the NCAA has established a set of "building codes" to guide such advances, the results of code application are uncertain. Lodge and tented camp developments are often well-located, camouflaged, and adequately built, while pastoralist housing is uncontrolled. Moving vehicle dust plumes have a short-term impact on scenic values, although they are not serious. Uncontrolled construction of housing units on the property would jeopardize the site's integrity. Structure construction must be constantly monitored and regulated. Human-wildlife conflict occurs when livestock is lost to wild predators and/or depredated by wildlife within or near a protected area. The Maasai people have a long history of coexisting with wildlife and have a high level of tolerance for it. However, causes such as poverty, food insecurity, expanding human population in the landscape, and diminishing resources are pushing cattle and animal interactions closer together, as well as increasing competition and conflict. ==Economy==