'''Basic Trope''': Changing a hostile SingleBiomePlanet into a habitable earth-like one.
* '''Straight''': An uninhabitable planet is turned into a second earth through massive ammounts of blood, sweat, and tears.
* '''Exaggerated''':
** The planet is turned into a jungle or water planet, teeming with life overnight.
** WorldHealingWave
** [[GenesisEffect A nebula is artificially concentrated into a solar system, carefully constructed to have the maximum number of habitable worlds]]
* '''Downplayed''':
** The atmosphere is just on the safe side of "breathable", but you'd still want your space suit. [[MortonsFork It's cheerfully explained that anyone not protected would freeze before they suffocated]], and "The atmosphere's getting thicker each day! Any century now..."
** Arbor Day has just as much cultural significance as Christmas does on certain worlds.
** A mountain is raised or lowered, or a valley filled in.
* '''Justified''':
** A network of fusion reactors are built to fuse the nitrogen in the atmosphere into oxygen, and bio-engineered plants are seeded that produce oxygen by converting the carbon dioxide through respiration, and spreads quickly, like Kudzu does; may be a MultipurposeMonoculturedCrop. Processor drones are released to condition the soil. Oceans are created by melting the polar ice caps and/or dropping comets. Once the planet has the same atmospheric composition that earth does, the fusion reactors are recalibrated to produce power instead of air and some of the bio-engineered plants cleared off and converted into fertilizer for farmland. The conditioning drones are recollected and refurbished for later use. That being said, the planet needs to be within certain parameters before the work can begin- 1-G gravity, inside the star's Habitable Band, soil quality, has an electromagnetic field, etcetera.
** [[GaiasLament Earth is dying]]; without a planet to escape to, mankind is doomed with it, so humanity begins a massive effort to build a new home.
* '''Inverted''':
** Earth is turned into an uninhabitable wasteland by an alien race trying to reproduce their homeworld's environment.
** [[{{TransHumanAliens}} The colonists are adapted to the planet, rather than the other way around.]]
** A lush, green (or blue) paradise is [[TerraDeforming converted into a world-wide factory, mine, or farm]].
* '''Subverted''': The planet is made habitable, [[TerraDeforming but only so it can grow massive amounts of crops very quickly]]. By the time a century's gone by, it's an unlivable desert again.
* '''Double Subverted''': ...Until the colonists decide that would make all they've invested in terraforming the planet mean nothing, and decide to take good care of their new home.
* '''Parodied''':
** The planet is made livable by spraying it with grass seeds from orbit.
** A [[PollutedWasteland desolated area]] is reclaimed by importing butterflies and bunny rabbits.
* '''Zig Zagged''': ???
* '''Averted''': Turning a rockball of a planet into an earth-like one is too energy, resource, and time consuming, so it's simply left barren while the survey fleet looks for planets that are already earth-like.
* '''Enforced''': ???
* '''Lampshaded''': [[{{Film/Alien}} Have a nice day, and keep Building Better Worlds]]
* '''Invoked''': A small oxygen garden is planted in the barren world's soil, ForScience and little else.
* '''Exploited''': [[MegaCorp Terraforming-for-You Inc.]]
* '''Defied''': "With our current level of technology, converting Mars into a habitable planet would take a billion years. It's easier and cheaper to just not bother."
* '''Discussed''': ???
* '''Conversed''': ???
* '''Deconstructed''':
** The planet to be terraformed already has intelligent life on it, and the process naturally makes it unlivable for the native species, causing them to go extinct. [[HostileTerraforming If the intelligent life is sentient, then the terraforming process becomes an act of genocide.]]
** Terraforming is a massive undertaking that takes ''eons'' to produce a habitable planet from a rockball.
** Because of that, the ''paperwork'' required for radical environmental conversion of a planet with a potential to develop its own biosphere [[ObstructiveBureaucrat takes so much the planet will become populated by itself]].
* '''Reconstructed''': New technologies become available that accelerates the work considerably.
Back to {{Terraform}}
%% Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Reconstructed''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Laughs''': ???
%%* '''Played For Drama''': ???