![Image](https://forums.factorio.com/images/ext/0e31fd3ac4b7cda2a07315fb3b824b6b.png)
I assume the negative pollution number means it sucks pollution up? Makes sense, it uses CO2 from the environment around it to grow trees. No complaints.
![Image](https://forums.factorio.com/images/ext/872a1fcd35a1a563e872984cc6c76deb.png)
But in that case, it's weird that it sucks up less pollution when fueled by crushed coal, no? I mean, the math checks out (75% of -0.5 is -0.375), but I thought the point of crushed coal was to reduce pollution - so maybe it shouldn't reduce the efficiency of pollution-sucking machines? Maybe a bug? Maybe I'm stupid?