And a lot of them are mega cities, very different from cities here.

而且这些城市大部分都是特大型城市，这和美国的城市是不同的。

Definitely, London is setting the example for coastal mega cities.

毫无疑问，伦敦正在为沿海大城市树立榜样。

Because it's the ultimate mega city, and I think it would be like traveling in the future in some sense.

因为它是一个超级城市，我认为在某种意义上，它就像一个关于未来的旅行。

We've morphed from riverbed dwellings to mega cities, sitting above nature and no longer with it.

我们已经从河床住宅转变为大城市，高居自然之上，却不再与自然融为一体。

No matter how well we protect a place like that — a mega city or a coastal mega city — there is always some risk remaining in case of failure or defense failure.

无论我们如何保护这样的地方——无论是大城市还是沿海城市——一旦防御失败，总会有一些风险存在。

And then you know, the pollution, of course, coming out of when you have mega cities, right, the air -- I see my kids playing, you know, every day when it's a bad weather, it just pains me to see that.

你知道吗，在那些人口稠密的特大型城市，空气质量常常令人堪忧，每天我看到我的孩子在那种环境里玩耍，特别是天气不好的，非常令我心痛。