"But if the current trajectory of carbon pollution levels continues unchecked, the world is on track for at least three degrees of warming. If we don't act now, the climate change damage caused to our Great Barrier Reef by 2030 will be irreversible."
The Great Barrier Reef, one of the most biodiverse places on Earth, teems with marine life and will be the focus of Australia's Earth Hour -- a global campaign which encourages individuals and organizations to switch off their lights for one hour on April 29 for climate change.
The report comes as the reef, considered one of the most vulnerable places in the world to the impacts of climate change, is at risk of having its status downgraded by the UN cultural organization UNESCO to "world heritage in danger".
Despite threats of a downgrade without action on rampant coastal development and water quality, Australia in December approved a massive coal port expansion in the region and associated dumping of dredged waste within the marine park's boundaries.