The Vespene gas in its pure form is formed in the thickness of the planet, closer to the core. The extractor is a living organism that grows on the surface of the planet over the places where there are natural emissions. By means of complex organic reactions like photosynthesis, fumes from numerous substances pure gas Vespene is synthesized and without the need for deep drilling. With the increase in the size of the living extractor, more organisms are involved in the biosynthesis, and the volume of produced gas has increased.

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Formula:
+ 2.5 * level * 1.08 to the power of level * (1.22 - 0.003 * maximum temperature of the planet)
- 15 * level * 1.1 to the power of level