ENVIRONMENTAL PROBLEMS IN ASIA
Environmental Problems in AsiaTwo major factors:Unparalleled economic development of the different countries in AsiaIncessant increase of human population
DesertificationSalinizationAlkalizationIntensified use to meet food supply needed
ContaminationProblems in waste disposalRapid population growth
Land degradationAAZLINNOTISISALINIZATIONZLAAKATNILOIALKALIZATIONNRDSCEIEIFIATTODESERTIFICATIONRemember SAD
Salinization and AlkalizationWhen salts come to the surface of the land or are carried in by waterWhen water well are overused, the water table lowers and saltwater or brackish water start to permeateBangladesh
DesertificationTransformation of fertile land into a desert through soil erosion or overcultivationIf it persists  will bring about serious health hazards; food scarcity, dust stormsChina
Overgrazing
As the size of animal herds increases, more pressure is wielded on the grazing landsIraq: sustains 11 million sheep which exceeds the lands’ grazing capacity
ZIIBRANNAUTOURBANIZATION
Urbanization in AsiaLed to the proliferation of depressed or slum areas
SWEAT  AISSODLPWASTE  DISPOSAL
Problem on Solid waste disposalTwo types of wastes:DomesticIndustrialHealth risks, degradation of the environment
Loss of BiodiversityIntroduction of non-indigenous species of flora and fauna in a particular regionPollution of soil, water and airRapid growth of the populationIntensification of the use of landDeforestationExploitation of natural resources?
POLLUTIONLOLOUNPTI
PollutionAir	- sulfur & coal		- Traffic in major cities (Beijing, Korea,     	   etc.)		- gas pollutants affect the quality of air	- lead to respiratory diseases
Water PollutionTwo most common water pollutants:Solid wasteUntreated wastewater from industries and factoriesMarine Water:Oil spillsResidues of pesticidesRed tide  dinoflagellates	 may lead to poisoning of people
Water PollutionFreshwaterPollution caused by rapid urbanization and industrializationIndustrial effluents, heavy chemicals and solid wastes  directly released to inland bodies of waterMine tailings (rejected materials from mining processes)Siltation
Water PollutionFreshwaterSiltationAccumulation of fine-grained sandy sediment carried by water	 two main causes:	1. Deforestation	2. Soil erosionTonle Sap
Clearing of forest trees Loss of natural habitat  flora and fauna endangeredCauses of deforestation:Commercial loggingSlash and burn agricultureCutting down of trees for fuel wood and forest firesNEODFTESAROTIDEFORESTATION
North Asia: environmental problemsPollution: due to waste	- radioactive uranium plants in Kazakhstan	- waste dumped in rivers: threaten water source	- extensive soil erosionUranium radioactivity causes mutations and growth of cancer cellsUzbekistan’s water is under radioactive threat
The importance of ecological balance in asia

Lesson 3 (environmental problems in asia)