Exam 13: Air Pollution

Which one of the following is a major component of photochemical smog?

As many as 12,000 people may have died as a direct or delayed result of the Great Smog of 1952..

Generally,the greater the mixing depth,the better the air quality.

Forest fires triggered by lightning are one of many natural sources of air pollution.

When air pollution episodes occur they generally result from a dramatic increase in the output of pollutants.

Ozone:

Inversions form most readily on sunny days.

Volatile organic compounds,a primary pollutant,are also called hydrocarbons.

Air pollution has only become an important urban problem in the last 75 years.

Small mixing depths are associated with stable air.

A reduction in visibility due to the absorption and scattering of light by air pollution is called:

Particulate matter is categorized according to:

This category of air pollutants is emitted directly from identifiable sources and pollutes the air immediately upon being emitted.

The largest single air pollutant (in terms of the quantity emitted each year)is carbon monoxide.

The single largest source of air pollutants is highway vehicles.

The vertical height reached by convective currents in the atmosphere is called:

Of the primary air pollutants monitored by the EPA,which one is found above recommended levels in more U.S.counties than any other?

Between 1990 and 2009,emissions of the five major primary pollutants rose significantly.

List two ways in which the wind acts to reduce air pollution.

Inversions aloft are often developed in association with sinking air that characterizes slow-moving centers of high pressure.