Large scale water conservation?

https://youtu.be/4It9NwND-zI

These people seems to be doing a lot of good things water conservation wise.

I like how the film looks back over 50 years of efforts. I'm going to embed it here (using that "Youtube" button above the text input box) so people can check it out more easily. (I find a lot of people are more likely to hit a "play" button than follow a link.)

Yup, a 50 years effort to conserve water and they seems to be doing a good job.