So said Shimon Peres in the latest KKL-JNF video, which explains how Israel is able to turn the arid wastes of the Negev desert into fertile soil for agriculture. It turns one drop of water into five drops of water.
http://www.youtube.com/watch?v=eK0nEV5dWBA&list=SPE2E17062DDBAC026
https://www.youtube.com/watch?feature=player_embedded&v=AlUfCpuGl8k