It is more than that. We also invent new technologies. Searching for resources, refining them, do the same stuff more cost-effectively, extraction from differen

It is more than that. We also invent new technologies. Searching for resources, refining them, do the same stuff more cost-effectively, extraction from different kinds of compositions and ores with processing methodologies, recycling, changing other elements of a system to require different amounts or mixtures in a final product are all different ways to "increase yield." On the scale of decades, collectively, this is very responsive to demand and why arguments about "only so much of resource X exists" are usually highly misleading.