Read the passage and answer the following questions.    

     Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, poisons the waver with chemicals and other substances, and damages the soil with too many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by scattering junk and liner on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.          Environmental pollution is one of the most serious problems facing mankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and even death. Polluted water kills fish and other marine life. Pollution of soil reduces the amount of land that is available for growing food. Environmental pollution also brings ugliness to man's naturally beautiful world. Governments should pass laws that require people and factory owners to stop certain polluting activities. 

Does man dirty the air with gases and smoke?