Great Barrier Reef Faces Unprecedented Threat from Record Ocean Heat

New research reveals the highest sea temperatures in 400 years, attributing the crisis to human activities.

Scientists reconstructed 400 years of ocean temperatures using coral samples.
Recent summers have seen record-breaking heat, leading to mass coral bleaching.
The Great Barrier Reef has experienced five mass bleaching events in the last nine years.
Experts warn that even with climate action, significant coral loss is likely.
The study urges immediate and deeper cuts in greenhouse gas emissions.