they don’t throw the litter in the trash cans but they litter into the street and the river instead. When the garbage is accumulating for a long time and cannot decay, it become waste water, make a bad smell and sewage pollution can threaten the health of humans and animals. The waste water can damage plans and animals in the river because too much of carbon dioxide from the garbage. Sometimes the animals around the area eat plastic so, make a lot of animal die and make ecosystem of environment imbalance. A lot of litter in places and in the river can make a bad smell because accumulate for a long time. Tourism development lead to increase pollution because tourism have to build the hotel and place for tourism, they use the area in the forest and cutting down some of tree to build the hotel and resort or maybe use woods to make a furniture. Cut the tree will decrease the number of animal as well, not only just decrease the tree because the forest is habitat of animals. Tourism which involves hotels, resorts, swimming pools, resorts overuses water resources as tourists often use more water when they are holidaying and they spend time to use the resources on environment more than at home. Tourism has developed as a largest industry and often involves construction of hotel and lodges. These lodges are created near or on the banks of a lake or a river. The sewage water flows into lake water or sea, polluting its marine ecosystem. Tourism also pollutes the tourism sites with noise and air pollutions because of tour buses. Carbon dioxide or toxic gas from car, ship and motorcycle it will float up and go out into the atmosphere. Moreover, quality of toxic gas in the atmosphere washed by rain, it fall down with the gas to the ground and destroy plants and soil.