The Jevons Paradox: Why Better Technology Alone Won’t Save the Planet

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Whenever a new green technology emerges, the headlines are often predictable. Electric vehicles will reduce emissions. More efficient solar panels will lower energy consumption. Artificial intelligence will optimise industry. Better batteries will solve climate change. Technological progress is frequently presented as the pathway to sustainability, allowing economic growth to continue while environmental impacts steadily decline.

It is an attractive vision.

Unfortunately, history suggests the relationship between efficiency and sustainability is far more complicated.

More than 150 years ago, British economist William Stanley Jevons made an observation that still challenges modern environmental policy. While studying Britain’s coal industry, he noticed that improvements in steam engine efficiency did not reduce coal consumption. Quite the opposite occurred. As engines became more efficient, they became cheaper to operate, encouraging their use in factories, railways and shipping. Total coal consumption increased rather than decreased. This phenomenon became known as the Jevons Paradox.

At first glance, the idea appears counterintuitive. Surely making something more efficient means using less of it?

The answer depends upon what happens after efficiency improves.

Imagine a factory that reduces the electricity required to manufacture each product by 20%. If demand remains constant, electricity consumption falls. However, lower production costs often allow prices to fall. Lower prices attract more customers. The factory expands production, hires more workers and builds additional facilities. Eventually it may produce twice as many products as before. Despite becoming far more efficient, its total electricity consumption could actually increase.

Efficiency reduced the cost per unit.

It also increased the number of units.

The second effect can outweigh the first.

This principle appears repeatedly throughout history. Modern cars consume less fuel per mile than those built decades ago, yet people often drive further because travelling has become cheaper and more convenient. Computer processors have become astonishingly energy efficient, yet global data centres consume enormous quantities of electricity because computing has become ubiquitous. LED lighting uses a fraction of the electricity of incandescent bulbs, but lighting has become so inexpensive that buildings, cities and homes illuminate spaces that would once have remained dark. Technological efficiency has frequently expanded markets rather than shrinking them.

This does not mean efficiency is a mistake.

Quite the opposite.

Efficiency is one of the greatest drivers of prosperity ever discovered. It allows society to produce more with fewer resources, raising living standards and encouraging innovation. The problem arises when policymakers assume efficiency alone will automatically reduce total environmental impact.

Economic systems rarely stand still.

Lower costs stimulate new demand.

New demand stimulates investment.

Investment creates further innovation.

Innovation lowers costs again.

The cycle repeats.

In many cases, efficiency becomes a catalyst for growth rather than conservation.

Artificial intelligence may become one of the largest examples of this phenomenon. AI models are becoming dramatically more computationally efficient. Many people assume this means data centres will consume less electricity. Yet falling costs make AI accessible to millions more businesses, consumers and applications. Instead of replacing one expensive AI query, organisations may perform thousands of inexpensive ones. The result may be a dramatic increase in total energy demand despite continual improvements in efficiency.

This does not imply technological progress should be abandoned.

It suggests that technology and policy must evolve together.

Efficiency changes incentives.

If society wishes to reduce total emissions, resource extraction or waste, incentives must also change. Carbon pricing, circular economy policies, renewable energy investment, product longevity, recycling infrastructure and responsible consumption all become increasingly important. Technology provides the tools, but policy determines how those tools are ultimately used.

As Chapman (2024) argues, the Jevons Paradox represents a fundamental challenge for the Circular Economy. While innovations such as blockchain, artificial intelligence and advanced manufacturing can improve resource efficiency and transparency, these technologies do not automatically reduce overall resource consumption. Without governance mechanisms that address rebound effects, greater efficiency may simply encourage greater production and consumption rather than delivering genuine sustainability. Technological progress must therefore be accompanied by institutional, economic and behavioural changes if society is to achieve long-term environmental goals.

Perhaps the greatest lesson of the Jevons Paradox is psychological rather than economic.

Human beings naturally celebrate innovation because it solves immediate problems. When a technology becomes cheaper, faster or more efficient, our instinct is to use more of it. Markets reward this behaviour because greater efficiency creates new opportunities for growth. There is nothing inherently irrational about this process—it is one of the reasons civilisation has advanced so rapidly.

The mistake is assuming that greater efficiency and lower environmental impact are automatically the same thing.

Sometimes they are.

Sometimes they are not.

As the world confronts climate change, resource depletion and biodiversity loss, the Jevons Paradox reminds us that sustainability is not simply an engineering problem. It is also an economic and behavioural one.

Technology will undoubtedly play a central role in solving humanity’s greatest environmental challenges. But history suggests that innovation alone is unlikely to be enough. Unless efficiency gains are accompanied by policies that guide consumption, they may simply enable society to consume more efficiently rather than consume less.

In the end, the Jevons Paradox does not argue against innovation.

It argues against believing that innovation, by itself, is a substitute for wisdom.

Reference

Chapman, D.L. (2024) The Circular Economy and the Jevons Paradox: Exploring Blockchain as a Mechanism for Sustainable Resource Management. University of Warwick. Available at: https://wrap.warwick.ac.uk/188566/ (Accessed: 23 July 2026).