People are fleeing the cold: there is a strong correlation between the average temperature in January and population growth, notes Edward Glaeser, a professor of economics at Harvard University.
哈佛大学经济学教授爱德华格雷泽指出，人们趋暖避寒：1月均温与人口增长有着密切的相互关系。
Population, environment, economics research results tell us: the productivity of certain conditions, population growth and ecological environment should be the affordability of them.
人口环境经济学的研究成果告诉我们：在一定的生产力条件下，人口的增长应当与生态环境的承受力相适应。
Population, environment, economics research results tell us: the productivity of certain conditions, population growth and ecological environment should be the affordability of them.
人口环境经济学的研究成果告诉我们：在一定的生产力条件下，人口的增长应当与生态环境的承受力相适应。
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