EVERYDAY SCIENCE

Detailed explanation-1: -The presence of extremely high concentrations of harmful substances in the environment is known as pollution. This pollution is caused mainly by certain human activities, resulting in environmental pollution that can be harmful to the health of living organisms.

Detailed explanation-2: -Pollution is the introduction of harmful materials into the environment. 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.

Detailed explanation-3: -Pollutants with the strongest evidence for public health concern include particulate matter (PM), carbon monoxide (CO), ozone (O3), nitrogen dioxide (NO2) and sulfur dioxide (SO2). Health problems can occur as a result of both short-and long-term exposure to these various pollutants.

Detailed explanation-4: -These six pollutants are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides.

Detailed explanation-5: -Examples are most pesticides, herbicides, insecticides used in agriculture and gardening, as well as chlorinated solvents used in many industrial processes and dry-cleaning activities. Based on their chemical structure, chemical contaminants can be classified into naturally-occurring and man-made categories.