Harmful gases are filtered, purified and converted to breatheable atmosphere by means of an Atmosphere Exchanger. Though it is not possible for an Atmosphere Exchanger to completely counter the ill effects of a harsh alien atmosphere, it goes a long way toward reducing colonial attrition caused by atmospheric effects. Atmosphere Exchangers eat massive amounts of Power, consuming 2,500 per turn.
1 per 100 population for maximum possible benefit
1,000 Improved Construction Materials
Nothing
2,500 Power
Content contributed by Paul Griesbach.