根据“Today, two-thirds of the world population live in a country or area where lifetime fertility (生育率) is below 2.1 births for each woman. A population with this kind of birth rate and low death rate would not grow or reduce over time.”可知,世界人口的增长率与出生率、死亡率及终生...
a随着时间的推移,地球会变得越来越拥挤,人们面临的人口增长问题也会更加严峻。 Along with the time passage, the Earth can become more and more crowded, the people face the population growth question also can be more stern.[translate]
aThere is controversy over whether population growth is good or bad. Over-population and continuing population growth are making substantial contributions to the destruction of Earth's life support systems. 有争论在人口增长是否是好或坏的。 人口过剩和继续的人口增长做对地球的生命维持系统的破坏的坚固贡...
Population dynamics over time as well as the global actions marshaled towards checking population growth were examined.Global PopulationThe global population reached 7 billion on the 31st of October, 2011 from an estimated six billion in 1999. Studies have shown that in the next 40 years, ...
The Earth’s population is expected to reach 9.7 billion by 2050. Experts estimate food production will have to increase by 70 percent to keep pace with that growth. Previous methods of agriculture will soon no longer be an option. According to a 2018 study, we have to turn away from meat...
Since the 1960s, world population has more than doubled, but the growth rate has been falling the entire time. 20世纪60年代至今, 全球人口至少翻了一番, 而人口增长率却在不断下滑。 We're witnessing the most fundamental shift to take place in modern human history. ...
Assuming continued exponential population growth we find the time for this equality of masses to be substantially shorter than that calculated Bartlett's method [1,2]. Other growth scenarios such as a linear projection tangent to the exponential curve are also discussed. We hope that, with ...
根据Iftheyconsumeasmuchaspeopleinhigh-incomecountriesdo,theinfluenceofthatpredictedpopulationgrowthcouldbemuchlarger,如果他们的消费与高收入国家的人一样多,预测的人口增长的影响可能会大得多。可知,如果低收入国家的人口消费与高收入国家的一样多,那么未来的人口增长将会更大。故填willbemuchlarger.(5)achievements ...
Earth is getting more crowded as the world population is still growing.Especially in some countries,their population growth is faster than others.These include Egypt,India,Nigeria and so on.However,the growth may not last always.The low birth rate (出生率) and more older people will be the ...
On 31 October this year, the world's No. 7 billion citizens from creeping up. Faced with rapid population growth, and we should not haggle over the earth " " How many people can really feed, but should reflect on their own way of life, change the global governance and the governance ...