Agriculture is not what it was — and, given that the global population is also not what it was, that may seem a good thing. Since the middle of the last century, new crop varieties, new cultivation techniques and new technologies have brought about a revolution in productivity: the average hectare, for example, now yields three times the tonnage of cereals that it did in 1961, according to Our World in Data.
農業今非昔比——考慮到全球人口也是如此，這似乎是一件好事。自上世紀中葉以來，新的作物品種、新的種植技術和新科技引發了生產力的革命：例如，根據《透過數據看世界》(Our World in Data)出版物，現在平均每公頃的谷物產量是1961年的3倍。
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