Environmental problems caused by mainly three reasons:
1. An increasing number of population.
the increasing demand for natural resources. For basic living needs such as need the area of arable agriculture is increasing rapidly. Until the deforestation.
2. The human settlements are the man-made environment. And will cause changes in the natural environment, as well as the rapid expansion of the city. This is usually a lack of planning and urban planning in advance cause of colonization.
3. The use of modern technology in the agricultural production. The use of fertilizers and pesticides has caused the decline of the quality of the soil. The toxic soils Which may spread down to the river as a source of water. Or industrial