[clark]

You can in 1.91 by giving them a negative resource generation ability (in previous Versions you'd have to use the solar resource generation or regular extraction abilities which depend on odd factors like the number of stars and the planet value)... but the cost doesn't show up right in the planetary net resource production display

So here is an interesting (at least to me) thought, what if the system didn't have a space port, would it still take resources away? Or is it like cargo space (I think cargo space dosen't need a space port, but I could be mistaken)?