The atmospheric hydrocarbons from human activity account for only 15% of the total, but the effect they have is great because of where they are released - in urban areas. The biggest emitter of hydrocarbons is from car engines.

As chemical reactions continue, the levels of ozone rise. Small molecules combine to form larger molecules and eventually tiny particles. These particles and the brown colour of nitrogen dioxide give the smog its characteristic look.

Smog can stay for a long time. It reduces incoming solar radiation.

There are many problems that smog cause. Thes

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By boosting efforts to detect and repair excessively polluting motor vehicles, the Smog Check II program is expected to reduce the total volume of smog-forming emissions from California's motor vehicles by about 100 tons per day this can be compared to the amount of ozone-forming emissions that is produced by californias power plants

California's sunny climate and mountainous areas are well-suited for smog formation.

e include medical problems such as Asthma and eye and skin irritations. This could be a long-term effect if it's not treated. Asthma will most likely be a long-term effect. Visibility is going to be very difficult if smog is going to be there for

Some common words found in the essay are:
, Check II, long-term effect, motor vehicles, won't able, california continues, means people, ozone-forming emissions, vehicle emissions,
Approximate Word count = 500
Approximate Pages = 2 (250 words per page double spaced)