Global environmental problems pertaining to sanitation and land:

• Lack of safe sanitation is a major cause of contamination of water sources, so without safe sanitation, safe drinking water is impossible.
• Many diseases are caused by the lack of safe sanitation or by poor quality water. Safe water is essential for hygiene. Diseases like diarrhea, schistisimiasis or infestation with ascaris, guinea worm or hookworm are associated with poor drinking water and inadequate sanitation.
• UN General assembly and the Human rights Council explicitly recognized the human right to water and sanitation. Sanitation facilities must be hygiene and technically safe to use. To ensure hygiene, access to water for cleaning and hand washing is essential.
• Sanitation facilities have to be culturally acceptable. This will often require gender-specific facilities, constructed in a way that ensures privacy and dignity.
• Water and sanitation services must be accessible to everyone in the household or its vicinity on a continuous basis. The price of sanitation and water services must be low.
• High population density leads to crisis related to land crisis. Cities with high population densities are considered to be overpopulated, depending on factors like quality of housing and infrastructure, access to natural resources, better job prospects, education, health services, recreational facilities etc.
• Most of the most densely populated cities are in southern and eastern Asia, through Cairo and Lagos in Africa also fall into this category.
• Most of above mentioned countries have poor HDI (Human Development Index). In most of these countries large part of population depends heavily on agriculture and other land related economic activities. Hence there is tremendous pressure on agriculture sector.
• Ever increasing population continuously exerts pressure on available land. Overuse of chemicals later results in poor productivity of land.