Report By: Jessica Colquhoun.

• The Great Barrier Reef is the largest reef system in the world and widely considered one of the seven wonders of the natural world.

• It is made of Thousands of reefs.

• The Great Barrier Reef is in Australia’s north-eastern coast.

• Coral reefs are unique ecosystems that teem with life - but this situation is changing.

• An increasing amount of green house gases is warming up oceans.

• Warmer sea waters and ocean acidification both pose a serious threat to the worlds coral reefs.

• Ocean acidification is the evil twin of climate change.• Some scientists predict that, as a worst-case scenario, sea water will have a pH of

7.8 by the end of the century.• An ocean pH of below 7.95

• Coral reefs are living communities of tiny animals called polyps.• Corals have A clever system for producing their own food.• Tropical corals grow very very slowly- Around 1-3 centimetres a year.

• Global warming caused by us has raised the ocean temperature 0.1f .This warming has occurred from the surface to a depth of about 2,300 feet .That is really deep!!