pollution in Santiago, a current problem

Santiago is one of the most contaminated city in latin america, and the worst of the country. The principal reason of that pollution is the high number of vehicles in the city. But another important reason is the geographical situation, is very knowed that santiago was founded in a valley, so the air can not circulate to other places and it accumulate inside the valley. The ozone layer is on of the most important problem in the world, and, Santiago is not the exception.
Contamination the outdoor is the big problematic today in Santiago. the environment has been altered by chemical, physical o reasons biological reasons, long ago. In the actually the wastes are mostly chemical those that alter our air and our quality of life.
Pollution is a problem who is trespassing all the countries and continent, is a world problem. In the actually, there are associations by government for all the world who are fighting against the pollution, because is turned in to a mayor problem, something that can not wait. The United Nations Environment Programme (UNEP) acts as a catalyst, advocate, educator and facilitator to promote the wise use and sustainable development of the global environment.