At present, throughout the world, over 80% of the land that is suitable for raising crops is in use.
目前,在世界范围内,80%以上适合种植农作物的土地都在使用中。
2
Improvements in road construction and sailing had occurred, but shipping heavy freight overland remained expensive, even with the use of rivers and canals wherever possible.
Over the last five decades, improved farming techniques and technologies have helped to significantly increase crop yields along with a 12% expansion of farmed landuse.