Australia: The Great Barrier Reef.

Hello everyone,
What is the Great Barrier Reef? Why is it important?
How long is it? How wide is it?
How many different types of corals are there?
Watch this exciting video and think.




Is it important for Australia's economy?
Is is in danger?
Why is it one of the wonders of the world?
Investigate about it.  Visit threats to the Great barrier Reef to know more.


Here you can get more information about the Great Barrier Reef.