Five of the Solomon Islands in the western Pacific have disappeared due to rising sea levels over the past seven decades, according to a study published in Environmental Research Letters. Another six islands there have lost more than 20 percent of their surface area, forcing people to relocate. Sea levels in the Solomon Islands have been climbing by 7 millimeters per year since 1994. "The human element of this is alarming. Working alongside people on the frontline who have lost their family home — that they've had for four to five generations — it's quite alarming," the study's lead author, Simon Albert of the University of Queensland, told CNN.