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