The document summarizes the physical geography of South, Southwest, and Central Asia. In South Asia, the Himalayas form a natural barrier and two major rivers are the Ganges and Indus. The climate involves summer and winter monsoons. Major land uses include cash crops, minerals, and population centers along coastal areas with rainfall. Southwest Asia is bounded by water and features the Tigris and Euphrates rivers. The climate is hot and dry over most of the region. Major land uses involve agriculture in northern areas, nomadic herding, and oil production. Central Asia's main physical features include highlands, deserts, and steppes, with a generally dry climate. Natural resources include oil, gas