Cropland per Capita

Cropland occupied roughly less than 1% of the global ice-free land area for a long time period until 1000 A.D., quite similar like the area used for pasture. In the centuries...直至公元1000年的漫长时段内，全球耕地在无冰陆地总面积中所占的比例大致不足1%，与牧场用地的占比颇为相近。在随后的数个世纪中……