1. This will be particularly true since energy pinch will make it difficult to continue agriculture in the high-energy American fashion that makes it possible to combine few farmers with high yields.
This will be particularly true是主句，since引导的是原因状语从句，that引导的是修饰the high-energy American fashion的定语从句。
美国的高能耗农业生产模式使得少数农民和大量土地的结合成为可能，而由于能源紧缺将导致该模式难以维持下去，这是显而易见的。
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差距啊。