Reacts with VOCs and sunlight to form bad ozone
Smells like rotten eggs
CO
Affects the most amount of people
Natural Source Lightning
Pb
Metal
O3
An example is Pollen
Interferes with oxygen transfer in body
SO2
Cannot be seen or smelled
Removed from gas/paint
Natural Source Volcanoes
Secondary Pollutant
NO2
different sizes that have different effects on health
Worse in Summer
