The problems are that coral reefs are disappearing . The other problem is ocean acidification. Another problem is that coral reefs are also being degraded by many other factors. People are polluting the water.
Areas of the coral reefs are warmer by the climate. There is a lot of carbon dioxide in the water. A lot of people are fishing at coral reefs and putting a lot of chemical stuff in the water.
Live coral is being removed from reefs to use as bricks, road-fill, cement for new buildings. Coral is also sold as souvenirs to tourists and to exporters.
The summary of this project is that people are polluting in the ocean and a lot of marine life are getting hurt. Also that people are cleaning up the ocean.