随着世界人口的持续增长，粮食的供应问题越来越令人担忧。
As world's population continues to grow, the supply of food becomes more and more of a concern.
我们的垃圾问题不是新问题，但随着世界人口的持续增长，它将成为一个越来越大的问题。
Our garbage problem is not new, but as the world's population continues to grow, it will become a bigger and bigger problem.
在20世纪80年代中期，我们世界人口第一次超越其承受能力，但这一人口仍在持续增长，我们也继续生活在寅吃卯粮的窘境中。
In the mid 1980s our world first overshot its capacity to provide for its human population, yet this population continues to grow and we continue to live on borrowed time.
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