claim: With marine ice cliff instability, sea-level rise for the next century is potentially much larger than we thought it might be five or 10 years ago
evidence: For instance, Mercer published a study in 1978 predicting that anthropogenic carbon dioxide warming and its potential effects on climate in the 21st century could cause a sea level rise of around 5 metres (16 ft) from melting of the West Antarctic ice-sheet alone.