6. Sea levels are rising faster today than ever before
Melting ice sheets and glaciers, and warming oceans lead to higher sea levels. Since 1900, sea levels have risen faster than in any preceding century in at least the last 3,000 years and this is set to continue for a very long time. Because oceans take a long time to warm, a lot of sea level rise is already baked-in. If warming is limited to 1.5C then over the next 2,000 years global mean sea level will rise to between two and three metres above current levels. If warming is limited to 2C this rises to between two and six metres above current levels.
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