The Ultimate Renewable Resource

Unless we run out of innovation, we are unlikely to run out of natural resources.

Despite repeated predictions that we will run out of this or that, we always seem to find a replacement for (or more efficient way to use) this and that to keep moving forward.

Or are you still relying on straight-line projections from the turn of the 20th century that didn't account for innovation to fight the great horse manure blight threatening our cities?