World population in 2100 could be 2 billion below UN projections


Earth will be home to 8.8 billion souls in 2100, two billion fewer than current UN projections, according to a major study published Wednesday that foresees new global power alignments shaped by declining fertility rates and greying populations. By century?s end, 183 of 195 countries ? barring an influx of immigrants ? will have fallen below the replacement threshold needed to maintain population levels, an international team of researchers reported in The Lancet.