? For the past 30 years, scientists have collected a considerable amount of convincing information demonstrating that air pollutants can be deposited on land and water, sometimes at great distances from their original sources, and can be an important contributor to declining water quality. These air pollutants can have undesirable health and environmental impacts, such as contaminated fish, harmful algal blooms, and unsafe drinking water. Researchers had found the sources of these air pollutants. They have worked diligently to improve the env ....