When the Wells Run Dry: Energy and  Motion Are Crippled, the Humble Bicycle Takes Over.

I have written several articles concerning about how the closure of the Straits of Hormuz affects the global flow and prices of oil. I have written about the rise and fall of mankind. I have also written the bicycle as mankind greatest invention. The last article I wrote was what will happen when the last drop of oil runs dry. Here are the links:

https://scientificlogic.blogspot.com/2026/03/geography-controls-flow-of-oil-when.html

https://scientificlogic.blogspot.com/2026/04/from-fire-to-fallout-ascent-burden-and.html

https://scientificlogic.blogspot.com/2026/04/the-bicycle-is-greatest-invention-ever.html

 

https://scientificlogic.blogspot.com/2026/04/when-last-drop-runs-dry-quiet.html

 

Let me go back to the bicycle  as our greatest of inventions when we face a crisis. 

There are moments in history when humanity is quietly advised to reconsider its path, and others when circumstances compel it to do so. The rising cost of petrol in recent times, exacerbated by tensions in the Middle East and the vulnerability of the Strait of Hormuz belongs to the latter. It is not merely a fluctuation in price; it is a reminder of how deeply our civilization depends on a resource that is finite, fragile, and unevenly distributed.

For more than a century, oil has been the unseen force behind modern life. It moves our vehicles, sustains global trade, and forms the basis of countless materials that surround us. Yet oil is not a gift that renews itself within human timescales. It is the compressed residue of ancient life, accumulated over millions of years and consumed within a few generations. When supply is threatened, as it is now, the illusion of permanence dissolves quickly.

Nowhere is this dependence more evident than in transportation. Our cities are designed for cars, our distances defined by speed, and our habits shaped by the assumption that fuel will always be available. But what happens when that assumption begins to fail?

To answer this, it is helpful to step back and examine a simple yet profound comparison between the motorcar and the bicycle.

A litre of petrol contains an astonishing amount of energy, approximately 34 million joules. In a typical car, this single litre can carry a person about 12 to 15 kilometres, depending on efficiency and driving conditions. At first glance, this seems impressive. Yet the internal combustion engine is inherently inefficient; much of that energy is lost as heat, noise, and friction. Only a fraction is converted into useful motion.

In contrast, the human body, though far less powerful, is remarkably efficient when paired with a bicycle. A person cycling at a moderate pace expends roughly 100 to 150 watts of power. Over the course of an hour, this translates to about 400,000 to 500,000 joules of energy. With this modest expenditure, a cyclist can travel 15 to 20 kilometres.

If we compare these figures carefully, a striking truth emerges. The energy contained in a single litre of petrol is enough, in principle, to propel a bicycle hundreds of kilometres if it could be converted with similar efficiency. Instead, when used in a car, it moves a much heavier machine only a fraction of that distance.

The bicycle, therefore, is not merely a simple device; it is one of the most efficient energy converters ever devised. It transforms human metabolic energy into motion with minimal loss, extending our natural capacity many times over. In terms of energy per kilometre per person, it far surpasses the automobile.

This comparison is not intended to diminish the usefulness of cars, which have undoubtedly transformed society. Rather, it highlights the imbalance that has developed. We have come to rely on a system that consumes immense energy for relatively modest gains in mobility, while overlooking alternatives that are elegant, efficient, and sustainable.

Before the age of oil, movement was slower, but it was also more balanced. People walked, cycled, or relied on simple mechanical and animal-powered systems. Distances were meaningful, and communities were often more localized. Today, while we cannot and should not abandon the advantages of modernity, we may need to recover some of that balance.

The bicycle offers a compelling path forward. It is accessible, affordable, and independent of fossil fuels. In urban environments, it can often rival or even surpass cars in efficiency and speed, especially when congestion is considered. For longer distances, it can be integrated with public transport systems, forming a hybrid model of mobility that is both practical and sustainable.

Beyond human-powered transport, we must also look to the natural forces that surround us. The wind that turns turbines, the sunlight that falls freely upon the Earth, and the flowing water that descends from higher ground, all represent sources of energy that do not diminish with use.

These renewable energies may not yet fully replace fossil fuels, but they offer a direction, one that is not constrained by depletion or geopolitics. Unlike oil, they are not concentrated in a few regions of the world; they are distributed, abundant, and continuously replenished.

The present crisis, therefore, is more than an economic challenge. It is an invitation to rethink our assumptions about energy, mobility, and progress itself. Must we always move faster, farther, and with greater consumption? Or can we learn to move wisely, efficiently, and within the limits of what the Earth can sustain?

In the quiet turning of a bicycle wheel, there is a lesson. It reminds us that progress need not always be complex, that power need not always be vast, and that sometimes the most enduring solutions are those that is in line closely with the natural capacities of the human body and the rhythms of the world around us.

When the wells of oil one day run dry, and that day will surely come—it may not be the most advanced machines that carry us forward, but the simplest ones, guided by deeper understanding.

And perhaps, to my gentle readers, that is not a step backward, but a step toward wisdom.