They say the world will become more crowded, Therefore, we will have even more environmental problems and live in a world with less energy available.

他们说世界将会变得更拥挤，因此，我们将有更多的环境问题，生活在这样一个世界能够使用更少的能量。

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Such pandemics will become more frequent as ecosystems become more crowded, less varied and more fragile.

随着生态系统更为拥挤，物种减少并变得更脆弱，大流行病会愈加平凡，随时爆发。

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