World Meteorological Organisation
New records were set in 2021 for rising sea levels, greenhouse gas and ocean heat
![A diver observes coral bleaching.](https://www.bigissue.com/wp-content/uploads/2022/05/33675818851_d2e64b3e5f_c-e1652884257832.jpg?w=768)
New records were set in 2021 for rising sea levels, greenhouse gas and ocean heat
Four out of seven "key climate indicators" hit records levels in 2021, scientists have revealed.