日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

Challenges loom as world population hits 7b

Updated: 2011-10-18 08:30

(Agencies)

  Comments() Print Mail Large Medium  Small 分享按鈕 0

The Asian giants

It's 6 pm in Mumbai, India's financial hub, and millions of workers swarm out of their offices, headed to railway stations for a ride home. Every few minutes, as a train enters the station, the crowd surges forward.

For nearly 7 million commuters who ride the overtaxed suburban rail network each work day, every ride is a scramble. Each car is jam-packed; sometimes, riders die when they lose their foothold while clinging to the doors.

Across India, the teeming slums, congested streets, and crowded trains and trams are testimony to the country's burgeoning population. Already the second most populous country, with 1.2 billion people, Indiais expected to over take China around 2030 when its population soars to an estimated 1.6 billion.

But even as the numbers increase, the pace of the growth has slowed. Demographers say India's fertility rate - now 2.6 children per woman - should fall to 2.1 by 2025 and to 1.8 by 2035.

More than half of India's population is under 25, and some policy planners say this so-called "youth dividend" could fuel a productive surge over the next few decades. But population experts caution that the dividend could prove to be a liability without vast social investments.

"If the young population remains uneducated, unskilled and unemployable, then that dividend would be wasted," says Shereen Jejeebhoy, a Population Council demographer in New Delhi.

Population experts also worry about a growing gender gap, stemming largely from Indian families' preference for sons. A surge in sex-selection tests, resulting in abortion of female fetuses, has skewed the ratio, with the latest census showing 914 girls under age 6 for every 1,000 boys.

For now, China remains the most populous nation, with 1.34 billion people. In the past decade it added 73.9 million, more than the population of France or Thailand.

Nonetheless, its growth has slowed dramatically and the population is projected to start shrinking in 2027. By 2050, according to some demographers, it will be smaller than it is today.

"It's like a train on the track that's still moving but the engine is already off," says Gu Baochang, a professor of demography at Beijing's Renmin University.

In the 1970s, Chinese women had five to six children each on average. Today China has a fertility rate - the number of children the average woman is expected to have in her lifetime - of around 1.5, well below the 2.1 replacement rate that demographers say is needed to keep populations stable in developed countries.

Three decades of family planning rules that limit urban families to one child and rural families to two helped China achieve a rapid decline in fertility.

主站蜘蛛池模板: a级网站在线观看 | 亚州欧美日韩 | 99re在线精品视频 | 99久久久国产精品 | 亚洲天堂999 | 日本毛片视频 | 天天躁夜夜躁狠狠躁 | 神马久久久久久 | 噼里啪啦国语在线观看策驰24 | av资源在线看 | 欧美精品99 | 最新日本中文字幕 | 91狠狠| 天天拍夜夜拍 | 国产一区二区三区免费在线观看 | 日韩一级片av | 中文视频一区 | 啪啪日韩 | 一区二区三区四区免费观看 | 狠狠久久| 免费观看一区二区三区 | 午夜在线观看免费视频 | 久久影院一区二区 | 精品一区二区三区免费看 | 先锋资源男人 | 亚洲毛片在线看 | 国产精品视频播放 | 狠狠干少妇 | 奇米成人网 | 久久久久婷婷 | av网页在线观看 | 91麻豆精品国产 | 日韩精品三级 | 色婷婷狠狠| 99久久精品免费看国产交换 | 三级免费毛片 | 免费av大片| 自拍偷拍第八页 | 欧美成人三级视频 | 一区二区三区在线视频播放 | 久久综合影视 |