translation.en: And as the middle class is on the rise, so is our global population, from 7 billion of us today to 9.7 billion by 2050, which means that by 2050, we are going to need at least 70 percent more protein than what is available to humankind today.
translation.zh: 随着中产阶级人口上升， 全球的人口也跟着上升， 到2050年，全球人口会从 70 亿增加到 97 亿。 这就意味着到那时， 我们需要的蛋白质将比 现在地球所拥有的多出70%。