• Effects on the environment and the importance of conserving the environment

Every human activity has consequences for both the natural and the human environment. Irrigation has changed parts of the Cholistan and Thal deserts into farmland; all farmland in Sindh was previously desert. Poor farming practices when using irrigation have further changed some areas, through waterlogging and salinity, with a consequent damaging effect on both natural and human environments. Soils are being eroded and pollution is affecting water supplies. There is more pressure on the environment from the need for development. Transport, processing and manufacturing are seriously polluting the air, especially in most of the cities of Pakistan. It is expensive to reduce pollution, and to do so uses money needed for other developments