我们正在耗竭可再生资源，例如木材，消耗的速度远远超过了他们的再生速度。
We are using up renewable resources, such as timber, much faster than they can be replaced.
我们正在耗竭不可再生的自然资源，例如化石燃料，消耗的速度远远超过了我们寻找替代品的速度。
We are using up non-renewable natural resources, such as fossil fuels, much faster than we are finding alternatives for them.
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