[Puke]

>Would it be possible to give a building the resource generation ability

yes.


>and have the number of resources generated be negative?


maybe, have to try it. if you CAN, then the maintnance for the building would be worse on a happy, high population, high resource percentile planet than it would be on a poor one. which would suck. also, your resource bonus from your race would work against you, and your maintnance bonus would have no effect. sort of lame.