Two billion people depend on them for drinking water...

二十亿人靠喝这些河中的水生存

On the delta of the Ganges and Brahmaputra,

在雅鲁藏布江和恒河三角洲地区

Completed, couple of years ago.

大坝很多年前就建好了

We could grow watermelons, maize, cotton.

我们可以在那里种西瓜 玉米 棉花

The fields' circular shape...

管子围绕一个中心轴灌溉耕地

But there is a heavy price to pay.

但这要付出沉重代价

You're an idealist.

你真是个理想主义者

How are our filmmakers today?

各位好啊

not only using up the water but the oil resources as well

不仅仅需要用水而且也要用到石油资源

the pumping water long distances, etc.

把水从远处抽上来 等等