Seeing as how "natural economic growth" is not infinitely sustainable (I'm operating under the assumptions that there are finite quantities of natural resources and human ingenuity is not infinite and infallible). It's probabilistically inevitable.
(Recycling also plays a part, though I don't know if it should be considered increasing the supply, or increasing our efficiency)
The only one that is a real problem is energy. Thanks to the laws of physics, we may not be able to forever increase our energy efficiency, and energy cannot be recycled.