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Lead is one of the more dangerous industrial compounds that can be found in the air.

The EPA's sulfur dioxide stats show the national average amount of sulfur dioxide polluting the air has dropped 83% between 19.

Nitrogen dioxide primarily impacts people inside of their homes and is a commonly cited corrosive pollutant that results from combustion appliances in the home.

This can be anything from a stove to a water heater that uses a pilot light.

These statistics give people the ability to undertake more measured responses to environmental contaminants and they provide a window into the impacts that the human race is having on the Earth.

Data collected by the United States Environmental Protection Agency (EPA) shows that air quality in the United States has continued to improve since the implementation of the Clean Air Act.

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There are three main types of radiation or radioactive decay depending on the isotope.