essentially leaves the environment unchanged,

基本上对环境没有改变
whereas, this kind of agriculture practiced in--

但是采用这种农业生产的...
it's now a world--center pivot irrigation is a worldwide technology.

现在全世界都在用中心旋转灌溉农业技术
And in many places it draws so much water so fast,

在许多地方它能快速喷射大量水流
and so much water is lost to evaporation,

那么多水就在此过程中蒸发了
that the underlying aquifer is rapidly being depleted.

地下蓄水层很快会被耗尽
Here are two center pivot photographs,

这里有两幅中心旋转灌溉农业的照片
and they too differ in capitalization.

它们资本化的程度也不一样
The one on the left is from Egypt,

左边这幅是埃及的
the one on the right is from Iowa,

右边这幅是爱荷华州的
and the difference between them

这两者的区别在于
in the cost of the land would be dramatic.

土地成本差异很明显