依靠原始数据，·计算有多少生物生产性土地和水域可在地球上获得。

Then calculate how much land and water can be available to human, and how much can be utilized by us.

youdao

依靠原始数据，·计算有多少生物生产性土地和水域可在地球上获得。

Then calculate how much land and water can be available to human, and how much can be utilized by us.

youdao