A new study published in *Nature* has revealed that global sea levels are considerably higher than previously estimated, which has serious implications for future climate impact evaluations. Katharina Seeger and Philip Minderhoud, researchers at Wageningen University in the Netherlands, discovered that earlier models underestimated sea levels because they depended on inaccurate global geoid models rather than local measurements. The study examined 385 scientific publications and found that ocean levels are, on average, 30 cm higher than previously thought, with some areas experiencing differences of up to 150 cm.