Pollution is a problem because it damages crops, soil, plants and trees, interferes with air travel, gets into the world's lakes, rivers and streams and is harmful to animals and people. Air pollution makes breathing difficult and is the leading cause of acid rain, which damages many things on the planet's surface.
Pollution is not just a problem in developed nations, and it is a worldwide situation that affects the soil, water and air in every country. Many countries, such as the United States, have passed laws to restrict companies from polluting the planet, but ozone pollution remains a problem.
