He addition to the air of any substance that has harmful or toxic effects is

The Six Toxic Chemicals that Cause Air Pollutants:

Carbon Monoxide. Carbon monoxide is a very toxic pollutant that forms when there is a lack of oxygen to make carbon dioxide.

Ozone.

Lead.

Nitrogen dioxide.

Particulate matter.

Sulfur dioxide.

Explanation:

not sure if this helped

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this