[Alneyan]

These facilities (Value Improvement Plants, Atmosphere Converters and Climate Control Facilities) do stack, so you may build a few of these to speed up the process. The Nature Shrine does not stack if memory serves right though, so only one of these would be effective in a given system.

Edit: And Wardad beats me to it. While speaking of the Deadly condition, it can be very long to fix depending on the "number" of the planet. The condition value goes from 0.1 to 1.5, 0.1 being Deadly and 1.5 being Optimal. However, 0.3 would be Deadly as well, and such a planet would be much faster to go up than a planet with a condition value of 0.1. So it is very likely you will see different results after the same amount of turns.

[ March 15, 2004, 21:18: Message edited by: Alneyan ]