They support fisheries. The reef also
protects the land from strong waves and
rising waters during storms. In addition,
sources for new medicines have been
found in coral reef algae and animals.
Approximately two million people
visit the Great Barrier Reef every year.
Some sail around the islands or view
the reef from an airplane. Scuba diving
is also popular. Objects
feet ( m)
underwater can be seen easily. Guidelines
protect both people and the reefs.
Climate change is a major threat to the
Great Barrier Reef. The temperature of
the sea is rising. This has led to new coral
diseases. When the temperature gets too
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