Fossil Materials and Modern Civilization

Almost All of Your Life Is Made of Oil

You wake up. You rise from polyester sheets. You brush your teeth with a plastic toothbrush. You put on nylon clothes. You step into shoes of synthetic rubber. You pick up a smartphone in a polycarbonate case. You walk on an asphalt road. You take food out of a polyethylene bag. You eat a lunch packed in a polypropylene container.

Where in this day is "oil"? Everywhere.

Plastic is usually discussed as "a disposable product that is bad for the environment." That is only the surface of the problem. The real problem is that the infrastructure of modern civilization itself depends on the material function of fossil resources.

The Essence of the Plastic Problem Is "Irreplaceability"

"Let's quit plastic," "de-plasticize" — this debate treats plastic as one option among several. Switch to paper. Switch to bamboo. Switch to glass.

Structurally, though, there is a mass of uses in which plastic cannot be replaced.

"De-plasticizing" talks about shopping bags and straws. But quit the plastic in medical devices, cables, water pipes, and semiconductors, and civilization stops.

Big Companies Exist Because Fossil Resources Exist

Today's big companies — Amazon, Apple, Toyota, Walmart — stand on the infrastructure of fossil resources.

Amazon's next-day delivery does not exist without asphalt roads and plastic packaging. Apple's products cannot be made without semiconductor photoresist and polycarbonate housings. Toyota's cars do not run without synthetic-rubber seals and lubricants.

Big companies call themselves "technology companies" or "manufacturers," but structurally they are "processors of fossil resources." Take away the material function of fossil resources and their business models collapse.

Going All-EV Is Reckless

"Make every car electric and oil will no longer be needed" — this idea ignores the structure of refining.

Diesel cannot be electrified on the demand side either. Heavy trucks (battery weight slashes payload), container ships (physically impossible to electrify), construction machinery (high load, long hours), farm machinery (no charging infrastructure in the field) — none has a realistic path to electrification. *It cannot be electrified on the demand side, and it always comes out of refining* — diesel will not disappear, for two reasons at once.

Gasoline, too, comes out of refining. Make every passenger car an EV and the gasoline that comes out has nowhere to go — it is hazardous and cannot be dumped, so fuel with no destination keeps piling up. *Under the present supply chain*, a hybrid car is the rational choice that uses up the gasoline that comes out at high efficiency (it burns more fuel than an EV, but wastes no refining by-product, and with its smaller battery eases the resource constraint on lithium and cobalt).

Going all-EV erases the destination of the gasoline that refining must produce, and then generates electricity separately to drive on — *a double investment in energy.* Why, then, does the push for all-EV go on? The same picture of money allocation as in the previous chapter explains it. Vehicles, charging networks, batteries — *all of it is "a measure you buy," and there is no shortage of people pushing it.*

The question is not "gasoline car or EV." It is *how far the substitution of materials (bio-materials) has come.* Only once bio-materials can replace naphtha does the option of shrinking oil refining appear. The order is backwards.

Fossil Resources Are Finite — Depletion Is Unavoidable

As long as materials are needed, refining cannot stop — that is the present structure. But the structure itself does not last forever — because fossil resources are finite.

Natural gas is the same. Ammonia, the raw material of nitrogen fertilizer, is made from natural gas, and natural gas too has a reserve life of about 50 years. *The era when fertilizer feedstock is "too expensive to buy" comes before depletion.* A geopolitical shock like the Hormuz crisis fast-forwards this process in an instant — a blockade or an airstrike sends costs leaping overnight.

The question is not "whether fossil dependency ends," but "whether a substitute exists when it does."

Fossil Resources Themselves Were Once Plants and Microbes

Here let us confirm the most basic fact underlying this chapter's argument.

Fossil resources are past plants and microbes themselves.

So when we use "things made from fossil resources," *we are in fact using substances made by plants and microbes hundreds of millions of years ago.* Plastics, synthetic fibers, chemical fertilizer — trace their origin and you arrive at ancient algae and ferns.

The implication is large.

The shift "from fossil resources to bio-materials" is in fact a shift *"from the biological materials of the past to the biological materials of the present."* It is not a change to something entirely different; it is having the same biological synthesis performed in the present tense. The Earth has always made materials this way — after spending several hundred million years of inventory in a hundred years, we simply return to the production line that is still running.

And whether present plants and microbes can make the same materials as their predecessors *depends on the diversity and health of present plants and microbes.* Preserving plant varieties that are being lost, restoring soil microbes (regenerative agriculture), securing places to grow diverse fungi and algae, refining the techniques that put photosynthesis and microbial fermentation to use — these are direct preparation of the material infrastructure of the post-fossil world.

In an age when naphtha-based materials are no longer available, there are only two sources of material. Microbes and plants — bioplastics (PHA by microbial fermentation), bacterial cellulose, mycelium (insulation, packaging, building material, leather substitute), cellulose and lignin (wood, hemp, bamboo), natural rubber, plant oils, starch, microalgae (cultivable while absorbing CO2).

The Honest Limits of Bio-Materials

Here something must be said honestly. *The move to bio-materials is not easy at all.* At present, bio-materials are no comprehensive substitute for petrochemical products.

These are not "technical problems that will be solved in time." They are physical and biological constraints. The growth rate of microbes does not match the throughput of a chemical plant. The growth rate of plants does not keep up with the growth rate of demand.

One More Fatal Limit — Bio-Materials Themselves Depend on Chemical Fertilizer

Beyond the five constraints above lies the most serious one. *The raw materials of bio-materials are farm products, and today's farm products cannot be grown at scale without chemical fertilizer.* And chemical fertilizer is made from fossil resources themselves.

So the scenario "replace fossil resources with bio-materials" carries a self-contradiction: *to grow the bio-materials, you put in fertilizer and pesticides derived from fossil resources.* As fossil resources thin, the agricultural base for making bio-materials thins at the same time.

And for phosphate fertilizer, the supply constraint from 2027 on is already in view (China's export halt of March 2026, the blockade of the Strait of Hormuz, peak phosphorus). The fertilizer constraint bites before the time frame in which mass production of bio-materials is supposed to get going.

The details are argued in the separate series link:/en/phosphorus-and-farming/[Phosphorus Depletion and Natural Farming], but the conclusion alone is this:

This is not "a desirable extra" but a necessary precondition. Restoring soil microbes, rebuilding mycorrhizal networks, using PSB (phosphate-solubilizing bacteria) — until these get going, the bio-material scenario does not get going either.

Where Bio-Materials Cannot Substitute — Cars, Data Centers, Fusion Reactors

Even if the cultivation problem were solved, *a mass of domains remains in which bio-materials cannot substitute.* Take the three core infrastructures of modern civilization in turn.

Cars

EV advocates say "just drive on electricity," forgetting that *the car body itself is a lump of fossil resources.*

Even for an EV, the body structure apart from the battery differs little from a combustion car and uses the same quantity of oil-derived materials. *An EV merely uses no oil "while driving"; it cannot be made "without oil."* The safety-critical parts (brake hoses, tires, the safety-glass interlayer) are especially hard to replace.

Data centers

The IT companies waving the "decarbonization" flag do business on a lump of fossil resources themselves.

AI, the cloud, social media — all of it runs inside boxes made of petrochemical materials. The photoresist of chip manufacturing can be made only from petrochemicals. *Digital civilization rides on oil civilization.*

Fusion reactors

Fusion is called "the ultimate clean energy," but few have asked *what the reactor is made of.*

The coil insulation, the vacuum seals, the radiation-resistant cables — all can be made only from petrochemicals. *Without oil, we cannot even build the reactor for the energy meant to replace oil.*

Cars, data centers, fusion reactors — every infrastructure of modern civilization stands on petrochemical materials, and bio-materials can replace only part of it. That is the most fundamental reason fossil resources must be used with care.

Building a Society That Can Adapt to Change

What this chapter has shown is the structural interdependence of fossil resources and modern civilization, and its constraints. But the conclusion is not "so let us decide every answer now." It is *let us build a society that can adapt to change.*

The core of adaptability is "distributed dependency" and "diversity"

What matters most for that is *not depending too much on any one thing, and valuing diversity.*

The more you depend on one particular thing, the more fragile you are when it changes. Turned around: *distribute dependency and keep diversity, and you can respond whatever changes.* This is the most basic principle learned from ecosystems. Monoculture is fragile; mixed planting is resilient. Society moves by the same structure.

Preserving plant diversity as material

Among all diversity, plant diversity matters most. Not only for food. Plant diversity as material and resource becomes the foundation of the post-fossil society.

Before fossil resources, humanity drew every material from plants.

But with the spread of fossil-based plastics, synthetic fibers, synthetic dyes, and synthetic pharmaceuticals, *the know-how of using these plant materials and the diversity of their varieties* are being lost fast.

• Domestic lacquer production has fallen to under 1/100 in a hundred years
• Native cotton has all but vanished (switched to American cotton in the Meiji era)
• Dye plants survive only in tiny quantities for crafts
• Medicinal plant production depends on imports from China
• Planting of building-timber species such as paulownia and spindle tree has collapsed
• Growers of ramie, kozo, mitsumata, and gampi are aging toward extinction

When these are needed again in the post-fossil world, we must avoid the situation where *"the plant itself no longer exists," "no one knows how to grow it," "the processing technique is lost."* A variety once lost is extremely hard to restore, and processing techniques, even when documented, lose their embodied part.

The key to the material supply of the post-fossil world is *the seeds and the species of diverse plants.* This is not "cultural heritage to be protected." It is the material infrastructure of the future itself.

The order of change cannot be predicted, but preparation is possible

"When, and in what order, will change come" cannot be predicted. Climate change first, geopolitical risk first, or a technological breakthrough first. The phosphate-fertilizer constraint of 2027 is certainly near; the rest is unknown.

But *"how fast and how wisely we can respond when change comes" can be prepared now.*

Use Fossil Resources With Care — The Time Axis of Strategy

Given the structural constraint of refining, the order is this: in the short term, use the fuel that refining produces while *cutting the waste of disposable plastic, over-packaging, and short-lived design to lower naphtha demand itself*; in the medium and long term, reduce naphtha demand further with bio-materials, and combined with the expansion of renewable energy, shrink refining step by step.

Conclusion — Preparing for the Post-Fossil World Begins With Regenerating Soil

The convenience of modern civilization is, in reality, material made from fossil resources. Energy can be replaced, but replacing materials needs microbes and plants. Yet bio-materials themselves depend on chemical fertilizer, and the feedstock of chemical fertilizer also comes from fossil resources. And bio-materials cannot make everything (cars, semiconductors, fusion reactors).

There is only one road to prepare for the post-fossil world — *regain the power to raise microbes and plants, and at the same time establish a cropping system that does not depend on chemical fertilizer.* Regenerate the soil before the supply constraint on phosphate fertilizer surfaces. This is neither "for the environment" nor "a farming matter." It is *a necessary precondition for rebuilding the entire infrastructure of modern civilization.*