The World's Population
The world's population is growing.世界人口正在增長客峭。
There are now over 7 billion people in the world.現在世界上有70多億人
During the 20th century, the population grew from 1.65 billion to 6 billion.在20世紀倍踪，人口從16.5億增長到60億
It's now growing at a rate of around 1.1 percent per year.現在它以每年1.1%的速度增長虫溜。
That means an increase of about 80 million per year.這意味著每年大約增加8千萬任内。
By 2024, the population is expected to be around 8 billion people.到2024年退疫，人口預計將達到80億左右参歹。
The growth rate used to be higher.過去的增長率更高
In the late 1960s, the rate of growth was about 2 percent.在20世紀60年代末，增長率約為2%岔霸。
Since then the growth rate has declined.從那時起薛躬，增長率開始下降
It is estimated that the growth rate would be less than 1 percent by 2020.據估計，到2020年呆细，這一增長率將低于1%型宝。
By the year 2050, the growth rate should be even less.據估計，到2020年絮爷，這一增長率將低于1%趴酣。
Even with a declining growth rate, the population will continue to grow.即使增長率下降，人口仍將繼續(xù)增長略水。
But it will grow at a slower rate.但它將以更慢的速度增長价卤。
In the past 50 years, the world's population has more than doubled.在過去的50年里，世界人口增長了一倍多渊涝。
It has doubled from around 3 billion in 1960, to more than 7 billion in 2011.這個數字從1960年的30億增長了一倍，到2011年已經超過70億
The rate of growth varies by country.增長率因國家而異床嫌。
The growth rate in India is more than twice that of China.印度的增長率是中國的兩倍多跨释。
And the growth rate inNigeria, which is in Africa, is more than twice India's growth rate.在非洲的尼日利亞，增長率是印度的兩倍多
Russia, on the other hand, has had a negative growth rate in some years.另一方面厌处，俄羅斯在過去幾年中一直處于負增長鳖谈。
When a country has a negative growth rate, its population isdescreasing.當一個國家出現負增長時，它的人口就會減少
