Pollution is something that is harmful which is introduced into some part of the environment. You will find pollution quotes that cover the water, the air, and even the land. These harmful substances can make an area unfit to live in, and pollution is responsible for diseases and illnesses all around the world. The environmental harm that pollution does can be very severe. An oil spill, the release of smoke and soot from a factory, and pollution that is released into waterways and oceans all cause damage to the world and the environment that we live in. There are many cities around the globe that have severe pollution problems. In places like Los Angeles and Beijing the air pollution is so bad at times that government officials issue a smog alert, and these conditions can cause asthma attacks as well as other medical problems.