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.

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