I tried, still not.
I tried less, still not.
My guess is that it is possible to change the condition of a planet negatively only with events or weapons, not with facility. Or I am really having something stupid and wrong that I can't find out..
Name := Deep Radioactives Refinerie I
Description := Large fusion reactors which process a planet's deep ore to generate refined high-energy
materials.
Facility Group := Resource Extraction
Facility Family := 5
Roman Numeral := 1
Restrictions := None
Pic Num := 61
Cost Minerals := 2500
Cost Organics := 0
Cost Radioactives := 0
Number of Tech Req := 1
Tech Area Req 1 := Radioactives Extraction
Tech Level Req 1 := 1
Number of Abilities := 3
Ability 1 Type := Resource Generation - Radioactives
Ability 1 Descr := Extracts 150 radioactives each turn.
Ability 1 Val 1 := 150
Ability 1 Val 2 := 0
Ability 2 Type := Planet - Change Organics Value
Ability 2 Descr := Plants are slowly destroyed by high radioactivity (1%).
Ability 2 Val 1 := -1
Ability 2 Val 2 := 0
Ability 3 Type := Planet - Change Conditions
Ability 3 Descr := Plants are slowly destroyed by high radioactivity (1%).
Ability 3 Val 1 := -50
Ability 3 Val 2 := 0