Title:
Solar Farms Add Pollution Per Level Instead of Reducing It (Confirmed Misbehavior in GC IV vX.XX)

Description:
In Galactic Civilizations IV, Solar Farms—presumed to be pollution-reducing improvements—are currently adding pollution to planets. This occurs per improvement level and contradicts their intended eco-friendly function. I confirmed via repeatable in-game experiments that pollution drops when Solar Farms are destroyed, suggesting they apply a positive pollution modifier rather than a negative one.

Steps to Reproduce:

1. Build up pollution heavy planet.

2. Build Solar Farms

3. Destroy Solar Farms

4. Watch pollution plumet.

OR

1. Build multiple Solar Farms on a planet with no manufacturing adjacency bonuses or industrial buildings.
2. Observe the increase in planetary pollution despite lack of typical pollution sources.
3. Remove one Solar Farm and note the pollution drop (typically ~2% per level).
4. Repeat for additional farms to confirm scaling behavior.

Observed Behavior:

• Solar Farms cause a ~2% pollution increase per level.
• Removing a Level 3 Solar Farm drops pollution by ~6%.
• Removing five Solar Farms dropped pollution from 82% to 35%.

Expected Behavior:

• Solar Farms should either not contribute to pollution or actively reduce planetary pollution.
• Pollution modifiers should scale negatively with improvement level if tagged as eco-beneficial.

Suspected Cause:

• Improper tagging of Solar Farms as pollution-generating structures.
• Sign inversion or inheritance from incorrect improvement class.
• Level-scaling logic applying pollution bonus instead of reduction.

Additional Notes:

• Solar Farms require Gigamass to construct, which is not refunded when destroyed—making this bug resource-costly for players who pursued eco-strategy builds.
• Player strategy was significantly disrupted across multiple planets due to misleading pollution mechanic.

Suggested Fix:

• Review pollution tagging on Solar Farm improvements.
• Adjust level-scaling to apply negative pollution modifiers consistent with intended function.
• Consider refunding Gigamass or issuing patch compensations for affected players