Why Is the Hole in the Ozone Greatest Over Antarctica

question 250

Multiple Choice

Why is the hole in the ozone greatest over Antarctica?

• A)South American countries have not ratified the Montreal Protocol and continue to release ozone-destroying CFCs.
• B)Chlorine freed from CFCs elsewhere migrate to the Antarctic region,where they are trapped by the polar vortex.
• C)Ozone,a greenhouse gas which traps ultraviolet energy radiated from Earthʹs surface,has highest concentration in Antarctica.
• D)The ozone hole is a natural phenomenon related to high polar stratospheric clouds.

---

Definitions:

Minimum Required Rate

The lowest rate of return that an investment must yield to be considered acceptable.

Residual Income

Income that continues to be generated after the initial effort has been expended, or in managerial accounting, the operating income that an investment center earns above the minimum required return on its operating assets.

Minimum Required Rate

The lowest return on investment that an investor is willing to accept, considering the risk involved.

Residual Income

The net operating income an investment earns above the minimum rate of return expected by its investors or company management.