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OZONE
ONE KIND OF AIR POLLUTION
A photochemical reaction
 Sunlight + a chemical = different chemicals
 Not all kinds of light
 Only shorter wavelengths (visible, UV)
 Examples:
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Photosynthesis in plants (movie)
Fading paint on your house, car
Fading colors of clothes in store windows
Making ‘good’ zone
Sunburn
DNA changes
Photochemical smog: car exhaust & sunlight= ozone
 (picture)
GOOD OZONE
 Very high - 10 to
30 miles (25 km)
 Called the
Stratosphere
 15 ppb ozone
 Absorbs short UV
light (<350 nm)
 Protects people &
all living things !
BAD OZONE
 0-7 miles high
 Called the
Troposphere
 Some is natural,
Some comes from
pollution
 Is bad for
people’s health
OZONE IS A GAS
(picture)
BAD OZONE
 Comes from car exhaust
 VOC - Volitile Organic Compounds
 NOx- NO3 Nitrates and NO2 Nitrites
 Sunlight causes chemical change
 Irritates your lungs and eyes.
Ozone affects people
Ozone affects plants
Will ozone damage our beans?
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