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.
农业今非昔比——考虑到manbetx app苹果 人口也是如此，这似乎是一件好事。自上世纪中叶以来，新的作物品种、新的种植技术和新科技引发了生产力的革命：例如，根据《透过数据看世界》(Our World in Data)出版物，现在平均每公顷的谷物产量是1961年的3倍。
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