[Wardad]

Climate Control is usefull for fixing the "Deadly" planet condition.
This planet (sector) facility does stack with other Climate Control facilties.

Value Improvement also stacks with it's self.

Religous Tech Trait has a Nature Shrine that impoves climate of every planet in a system. It also improves Value of every planet in a system.
The Nature Shrine does not stack with itself.
It is a system ability and stack with the planet ability of the Climate Control Facility.