[Suicide Junkie]

Ah, you are slightly confused as to the type of infinity meant by infinite resources.

Take Farming on earth = Organics.

We have infinite organics, since plants will continue to grow for billions of years until the sun kills everything on earth and boils away the oceans as it dies.

We have quite limited facility space for organics farms, though, limiting the AMOUNT of that infinite resource we can get each month.

There is also the option of getting more aggressive facilities, as in some mods, that will harvest more in the short term, but that will degrade the conditions and organics value of the planet. This would be forest clearcutting operations, oversized factory farms, and such.