Professor Arie Haagen-Smit, a perfumery chemist at the California Institute of
Technology, was the first to show that placing automobile emissions containing
nitrogen oxides ( NO x ) — consisting of nitrogen oxide ( NO ), nitrogen dioxide ( NO 2 ),
and unburned hydrocarbons — in sunlight would produce ozone and eye irritants such
as formaldehyde. Professor Frances Blacet, chemistry professor at the University of
California, Los Angeles, was the first to point out that NO 2 photolysis was responsible
for the production of oxygen atoms in the troposphere (see Oxidized and Reduced
Nitrogen in the Atmosphere). This led to the realization that the following chemistry
was responsible for both the production and loss of ozone in the troposphere
Professor Arie Haagen-Smit, a perfumery chemist at the California Institute ofTechnology, was the first to show that placing automobile emissions containingnitrogen oxides ( NO x ) — consisting of nitrogen oxide ( NO ), nitrogen dioxide ( NO 2 ),and unburned hydrocarbons — in sunlight would produce ozone and eye irritants suchas formaldehyde. Professor Frances Blacet, chemistry professor at the University ofCalifornia, Los Angeles, was the first to point out that NO 2 photolysis was responsiblefor the production of oxygen atoms in the troposphere (see Oxidized and ReducedNitrogen in the Atmosphere). This led to the realization that the following chemistrywas responsible for both the production and loss of ozone in the troposphere
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