We have already lost some 80 percent of the coral reefs in the Caribbean over the last three decades, and losses in the Pacific Ocean are also widespread. Reefs are like cities, with some parts growing and some parts being destroyed. When the net growth is positive, reefs can persist. Amazingly, coral reefs are threatened by such atmospheric conditions as

A) the growing hole in the ozone.
B) carbon dioxide emissions and global warming.
C) increases in UV radiation and the amount of reflected light.
D) increased particulate matter resulting in decreased UV rays.

The answer is B: Carbon Dioxide emissions and Global Warming

throughout the 3.5 billion year history of life on earth there has been a natural, low rate of species extinction known as

how is a scale different from a scale factor?
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At the present time, scientists are confident that _____ processes and features are not restricted to Earth.

Use the passage to answer the question.

Which sustainability measures were implemented in the face of this crisis?

A.

preservation and conservation
B.

resource development and conservation
C.

resource development and preservation
D.

environmental protection and social equity
E.

environmental protection and economic growth

Which nations produce more of the world's pollution?

LDCS

MDCs

A rock that is especially rich in some commodity that is valuable is a mineral ; this rock is said to be , and the material that is desired in the rock is a(n) .

the southernmost himalayas are known as _____
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