Our timetable will achieve the stature of a natural phenomenon. A planet's
life is a vast, tightly interwoven fabric. Vegetation and animal changes will
be determined at first by the raw physical forces we manipulate. As they
establish themselves, though, our changes will become controlling influences in
their own right -- and we will have to deal with them, too. Keep in mind,
though, that we need control only three percent of the energy surface -- only
three percent -- to tip the entire structure over into our self-sustaining
system.

-PARDOT KYNES, Arrakis Dreams