Which paragraphs in this excerpt from the article "The Melting Arctic" from the European Environmental Agency rely on expert opinion to support the organization's point of view?
)Greenland's ice sheet contains enough water to increase global
sea levels by 7 meters. In any case, if it were to melt completely, it
would take many centuries. Recent melting of the Greenland ice sheet is
estimated to have contributed up to 0.7 millimeters a year to sea level
rise (about one quarter of the total global average sea level rise of
about 3.1 mm/year). Projections for global average sea level rise
estimates by 2100 vary from 0.2 to 2.0, depending on the model and
scenario used.