US Patent 7488456 Method of treating atmospheric pollutants

A method of reducing at least one atmospheric oxidizing pollutant, such as ozone, with a reducing agent comprises contacting the reducing agent with the at least one atmospheric oxidizing pollutant, wherein the reducing agent comprises a precious metalfree trap material, such as a zeolite, including at least one trapped atmospheric reducing pollutant, e.g. a hydrocarbon, whereby as the at least one atmospheric oxidizing pollutant is reduced the at least one trapped atmospheric reducing pollutant is oxidized.