ARTIFICIAL REEFS
Coral reefs play an important role in the health of the world's oceans. Vibrant in color and rich in biodiversity, they are the life support system to thousands of marine organisms. Biologists call them "the rainforests of the sea" because of their multi-functional purpose on Earth. But changes to the climate and the environment are causing a great deal of stress to coral reefs. Nervous scientists are testing the waters for ways to protect coral reefs from disappearing. One way that's been proven to resuscitate coral is to create artificial reefs by planting coral on specially designed structures called "reef balls". So far half a million reef balls have been deployed in more than forty countries. CNN's Michael Holmes dives into the Persian Gulf waters off Kuwait to see how these prehistoric looking objects can breathe new life underwater within a short time.