A 30-fold increase in nitrogen fertilizer consumption is supporting only four-fold increase in food grain production.

氮肥用量翻了 30 倍，却只让粮食生产翻了 4 倍。

A 30-fold increase in nitrogen fertilizer consumption has resulted in a four-fold increase in global food grain production.

氮肥用量 30 倍的暴涨促使全球粮食产量翻了 4 倍。

If you look at the nitrogen fertilizer consumption from the beginning of the Green Revolution, it has grown nearly 30 fold.

对比一下绿色革命初期的氮肥用量，如今已经翻了将近 30 倍。