全球人口在2011年达到70亿，并在2021年达到79亿。预计到2030年这一数字将增至约85亿，到2050年达到97亿，到2100年达到109亿。 全球人口急剧增长的主要 ...

As the theme of this year’s World Population Day ... In 2011, the global population reached the 7 billion mark, it stands at almost 7.9 billion in 2021, and it's expected to grow to around ...

Map O.1 Use of aggregated cellphone records to track mobility week by week during COVID-19 lockdowns in The Gambia, March–May, 2020 http://bit.do/WDR2021-Map-O_1 ...

Today, more than half of the world’s population – 4.4 billion people – lives in cities. This shift is set to continue, with the urban population expected to more than double by 2050, at which point ...

A demographic crisis is rumbling in the world's second-biggest economy, with China's birth rate at a record low. It stands to destabilize a key engine of the world economy, and could shake China's ...