Exam 18: Air Pollution

About 97 percent of all ozone in the atmosphere is found in the

A greenhouse gas used as a refrigerant,a solvent,and during the manufacture of foam:

How can topography contribute to pollution in a city or region?

Which of the following is a major way in which chlorofluorocarbons can enter the stratosphere?

Erosion of limestone buildings,fountains,and sculptures is caused largely by

An air quality index value of 35 on a particular day would indicate ____ conditions.

Thunderstorms are most likely to form on a day when smokestack plumes have a

The mixing depth is

The urban heat island is

Which of the following contribute(s)to the formation of an urban heat island?

When chlorofluorocarbons are subjected to ultraviolet radiation,____ is released which rapidly destroys ozone.

List some of the ways that pollutants are removed from the atmosphere.Does this occur quickly or slowly?

Once released into the atmosphere,chlorofluorocarbons remain about

Collectively,particles of soot,smoke,dust,and pollen are called

The smoke in London smogs came primarily from

What causes acid rain? What are some of the environmental concerns associated with acid rain? Are problems with acid rain confined to a small area or do they extend over a large region?

Volcanoes are an important natural source of

Rain with a pH of 5.6 would be considered

A mixing layer is characterized by

Describe how the use of a tall smoke stack might improve air quality in the vicinity of a large industrial facility.