Pollution
... Millions of people around the world are being affected by air and water pollution, some pollution causing cancer or other diseases. In Leinwand’s book: Air and Water Pollution, he states that we have dirty air due to the fact that we breathe, and our very breath is a pollutant. ... It was not until recent times that the problem of air pollution became such a serious topic. ... Progress has increased pollution in the air. Large factories that employ many people produce the most pollution in our air today. ... Leinwand states that the greatest cause of air pollution is the release of unburned fuel into the air, usually in the form of smoke or exhaust.