Life expectancy at birth, female (years) ( 1 ) United Nations Population Division. World Population Prospects, ( 2 ) Census reports and other statistical publications from national statistical offices, ( 3 ) Eurostat: Demographic Statistics, ( 4 ) United Nations Statistical Division.
Effect on human health: The land when contaminated with toxic chemicals and pesticides lead to problem of skin cancer and human respiratory system. The toxic chemicals can reach our body through foods and vegetables that we eat as they are grown in polluted soil.
More than half of the dry areas worldwide are. affected by land degradation (Dregne and Chou, 1994). Although water erosion is the. dominant human-induced soil degradation process, an extent of 0.8 million km2 suffers from. secondary salinization caused by land mismanagement, with 58% of these in irrigated areas. alone, and nearly 20% of all irrigated land is salt affected (Ghassemi et al ., 1995).