Over the last 50 years the earths population has more than doubled.
With such a large increase in world population you would think this would mean a larger portion of land and people would have to be devoted to producing food. You would also think that this would have a negative impact on the environment through the cultivation of land, fertilizer run-off, etc.
Fortunately over the last 50+ years agricultural innovations have been developed and implemented which have resulted in a decrease in the amount of land used for agriculture and an increase in land productivity. Some of these innovations came from genetics others from engineering.
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