translation.en: Biological nutrition can supply about 500 million humans, which means that if we all wore Birkenstocks and cotton, the world would run out of cork and dry up.
translation.zh: 生物养分可以供养五亿人， 亦即如果我们都穿勃肯鞋和棉织品， 世界会因为软木耗尽而枯竭。