A lecture by Pardot Kynes to the Fremen

Our first goal on Arrakis is grassland provinces. We will start with these mutated poverty grasses. When we have moisture locked in grasslands, we'll move on to start upland forests, then a few open bodies of water — small at first — and situated along lines of prevailing winds with windtrap moisture precipitators spaced in the lines to recapture what the wind steals. We must create a true sirocco — a moist wind — but we will never get away from the necessity for windtraps.
This ecological transformation of Arrakis relies upon us controlling three percent of the energy surface — only three percent — to start a self-sustaining system.
Learn this lesson well, our transformation begins in the plantations of the south and proceeds in simple steps.
This is a project of generations. You will not live to see a green Arrakis. Nor will your children. Or their children. But one day, Arrakis will bloom.