translation.en: When people talk about the need to increase global food production to feed those nine billion people that are expected on the planet by 2050, I always think of these graphs.
translation.zh: 当人们在讨论着需要扩大全球 粮食产量来喂饱2050年之际 预计的全球90亿人口， 我总是会想起这些图表。