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sporefan's definitions

PTHC

Pressure, Temperature, Humidity Control.
Abbreviation used (mainly) in science fiction when describing the process of terraforming a planet i.e. making a planet more "earth-like", improving its chances of supporting Life.
Humidity refers to atmoshperic density, not concetration of vapor (H2O) gas.
The 2008 Maxis game "Spore" has comprehensive PTHC tools.
by sporefan March 31, 2009
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