Scenarios for Coral Reefs (IMAGE) Coral Reef Targeted Research Program Caption How CRTR Program scientists envisage the world's coral reef systems will look under three environmental scenarios (left to right): 375ppm, +1°C; 450-500ppm, +2°C; and above 500ppm, above +3°C. Credit Coral Reef Targeted Reseach Program Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.