Everyone is freaking out about this graph, showing that the world's population is going to peak soon and then start to decrease.
大家都在为这张图表感到惊慌，这张图显示的是世界人口即将达到峰值，然后开始减少。
So this is true.
这是真的。
Demographers think that the world's population is going to peak around 10.9 billion before starting to decrease quite soon.
人口统计学家认为，世界人口将达到 109 亿左右的峰值，然后很快开始减少。
So today we're going to explain why the world's population is declining, why some people think this is the end of us, while others think this could be the best possible situation for humanity.
因此，今天我们将解释为什么世界人口在减少，为什么有些人认为这是我们的末日，而另一些人则认为这可能是人类最好的处境。
This is some of the most fascinating information I've learned in years, so let's get into it.
这是我多年来了解到的最吸引人的信息，让我们一起来看看吧。
We first started recording population size in 4000 BC, when the Babylonians used birth and death census data to understand population size, to figure out how much food they needed to produce, and how to plan for the future.
In many ways, now we're still doing the same thing.
Current governments use census data, such as birth and death certificates, to understand their own population size and understand how much food, again, that they need.
But now, society is more complex, so we design income tax for future investments, plan infrastructure to keep our citizens healthy and happy, and organize healthcare and education around our population sizes.
Now, when we want to understand the whole Earth's population, we have to rely on overarching bodies like the UN.
