THE ENVIRONMENT

Botswana faces two major environmental problems: drought and desertification. The desertification problems predominantly stem from the severe times of drought in the country. Three quarters of the country's human and animal populations depend on groundwater due to drought. Groundwater use through deep borehole drilling has somewhat eased the effects of drought. Surface water is scarce in Botswana and less than 5% of the agriculture in the country is sustainable by rainfall. In the remaining 95% of the country, raising livestock is the primary source of rural income. Approximately 71% of the country's land is used for communal grazing, which has been a major cause of the desertification and the accelerating soil erosion of the country.

Since raising livestock has proven to be profitable for the people of Botswana, the land continues to be exploited. The animal populations have continued to dramatically increase. From 1966 to 1991 the livestock population has increased from 1.7 million to 5.5 million. Similarly, the human population has increased from 574,000 in 1971 to 1.5 million in 1995, nearly a 200% increase. "Over 50% of all households in Botswana own cattle, which is currently the largest single source of rural income." "Rangeland degradation or desertification is regarded as the reduction in land productivity as a result of overstocking and overgrazing or as a result of veld product gathering for commercial use. Degradation is exacerbated by the effects of drought and climate change." Environmentalists report that the Okavango Delta is drying up due to the increased grazing of livestock. The Okavango Delta is one of the major semi-forested wetlands in Botswana and one of the largest inland deltas in the world; it is a crucial ecosystem to the survival of many animals