Comment by adrian_b

Those are derived from crude oil only because for a long time that has been the cheapest way to make them, not because oil were necessary in any way.

And it was the cheapest way only because most prices are fake, because they do not correspond to the cost of closed cycles of the materials used to make a product.

All those things require mostly energy, air, water and a few abundant minerals and metals to be made. Technologies to make them in this way have already existed for almost a century (e.g. making synthetic hydrocarbons, to replace oil), but they are still very inefficient. However, the inefficiency is mostly due to the fact that negligible amounts of money have been allocated for the development of such technologies (because as long as the use of fossil oil is permitted, there is no way for synthetic hydrocarbons to be cheaper), in comparison with the frivolous amounts of money that are wasted on various fads, like AI datacenters.