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@freddo
ok. 1.3 metres but:
"As yet the contribution to sea level rise of the Antarctic is small, but the trend of warming and ice sheet collapse is causing concern[/U][URL="http://en.wikipedia.org/wiki/Sea_level_rise#cite_note-46"][/URL]"
"The [U]West Antarctic ice sheet, lying at an average height of about 1,800 metres, holds enough ice to boost global sea levels by up to six metres."