besides of advantages of tourism that we know, there are still some unknown disadvantages of this valuable sector. The more turn on develops, the more polluted the environment will be. tourism growth has caused a negative compact on the environment that can lead to destroying natural habitats of wild animals. Invested transportation an accommodation let buildings, roads, hotels and shops be constructed excessively. This may cause a rise in the cost of living which means local people have to work harder to afford for the increasing prices of goods, services and housing. Besides, visitors at home or abroad can freely litter without any warning or money fining which make trash collectors overwork and contermindle (???) the air we breathe.