07/10/30 22:56:59
How much of the earth’ssurface does water cover?
What are the two most worrying problems for this millenium?
Do we use about 70% of the water we have for agriculture?
お願いいたします。
07/10/30 22:56:59
How much of the earth’ssurface does water cover?
What are the two most worrying problems for this millenium?
Do we use about 70% of the water we have for agriculture?
お願いいたします。