Smog
Jake Sand
What is Smog
Smog is the two words SMOKE and FOG. It was first used in London in the 1900s. Its a mixture of pollutants but is primarily made up of ground level ozone.
Causes
Cars and Trucks exhaust and the sun makes brownish smog. Some other things that cause smog are coal emissions, industrial emissions, forest and agricultural fires.
What it effects
If you have asthma being exposed to high levels of smog, smog can trigger asthma attack. You could have throat/chest irritation. It will irritate your respiratory system.
Prevent
You could buy a car that runs on batteries. You could buy a new car, new cars don't produce as much smog. You could also buy a hybrid car. You could bike or walk.
NASA | The Smog Bloggers