The certainty put forward by the IPCC is highly questionable. having reviewed scientific papers published by hundreds of scientists on solar influences.
estimates suggest everything from no role for the Sun in recent decades (implying that recent global warming is mostly human-caused) to most of the recent global warming being due to changes in solar activity (that is, that recent global warming is mostly natural).
Reefs are apparently in terminal decline. But how many species should an average inshore reef have? How many corals are there at Pixie Reef, near Cairns?
The relative contributions of natural and human-caused climate change remains poorly understood and it is misleading for the IPCC to suggest otherwise.