Not only is dangerous sea level rise “absolutely guaranteed”, but it will keep rising for centuries or millennia even if the world stopped emitting greenhouse gases tomorrow, experts say. Rising seas are one of the most severe consequences of a heating climate that are already being felt. Since the 1880s, mean sea level globally has already risen by 16cm to 21cm (6-8in). Half of that rise has happened over the past three decades. Q&A What is The Rising Ocean series? Show It started slowly but is surely picking up speed: the ocean, long considered so big it couldn't be affected...