Which Statement Best Describes What Has Happened to Air Quality

question 21

Multiple Choice

Which statement best describes what has happened to air quality since the United States outlawed the use of chlorofluorocarbons,halons,and carbon tetrachloride?

• A)Air quality immediately improved
• B)Air quality is slowly improving
• C)Little change occurred because these chemicals remain in the atmosphere
• D)Nothing has happened because other countries worldwide continue to extensively use these products.

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Definitions:

Income

The financial gain earned or received over a period of time, typically through employment, investments, or business operations.

Flow Measure

A term used in economics to describe a quantity measured over a specified period of time, such as income per month or spending per year.

Quantity Demanded

The total number of units of a product or service that purchasers are eager and capable of procuring at a designated price level.

Hard Drives

Storage devices used in computers and servers to store data persistently.