EVERYDAY SCIENCE

Detailed explanation-1: -These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land.

Detailed explanation-2: -These six pollutants are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides. Podcast – What is Modeled Air Data?

Detailed explanation-3: -Major sources of toxic air pollutants outdoors include emissions from coal-fired power plants, industries, and refineries, as well as from cars, trucks and buses. Indoor air also can contain hazardous air pollutants from sources that include tobacco smoke, building materials like asbestos, and chemicals like solvents.

Detailed explanation-4: -Harmful germs and chemicals can get in the water from many sources, including: Fertilizers, pesticides, or other chemicals that have been applied to land near the water. Concentrated feeding operations (large industrial animal farms)

Detailed explanation-5: -The main point source of pollution to water is from sewage and waste water treatment, while for diffuse pollution, main sources are from farming and fossil fuel power plants (via the air).