Terraform
From Alpha Centauri Wiki
Terraforming is an action performed by formers remaining a number of turns in the current square to alter the contents of the square. Some actions also alter surrounding squares as a result. See Category:Terraforming for options.
Terraforming may be undone by units occupying a square by pressing 'd'. Air units and Heavy Artillery units may bombard a square for a partial chance at undoing terraforming.
