权威例句
Shanghai: a case study of negative population growth.The case for fewer people : the NPG forum papersPopulation and social security.Negative Population GrowthNegative Population GrowthThe tightening conflict: population, energy use, and the ecology of agricultureConfronting a Surfeit of People: Reducing Global Human Numbers to Sustainable Levels An Essay on Population Two Centuries after Malt...The most overpopulated nation.The Cairo conference on population and development.The most overpopulated nation