Defossilisation: Why the Energy Transition Needs a New Framework

Defossilisation: Why the Energy Transition Needs a New Framework For decades, the global conversation has centred on decarbonisation. Governments, industries, researchers, and investors have all focused on reducing carbon emissions to address climate change. Decarbonisation remains an essential objective. However, as the energy transition matures, it is becoming clear that another question deserves equal attention: Where does the carbon come from? This question leads to a broader concept that I call defossilisation. Carbon is Not the Enemy Carbon is fundamental to life and modern industry. It is found in food, medicines, chemicals, plastics, construction materials, and many energy carriers. The challenge is not carbon itself. The challenge is our continued dependence on extracting new geological carbon from coal, oil, and natural gas, and transferring it into the active carbon cycle. For more than a century, industrial society has relied on this one-way movement of carbon from underground reservoirs into the atmosphere. That is the process that must change. What is Defossilisation? Defossilisation is the transition from continuous extraction of geological fossil carbon to the use of renewable and recyclable carbon circulating within a managed industrial carbon cycle. This definition shifts the focus from simply reducing emissions to changing the source and management of carbon itself. The objective is to minimise the need to introduce new fossil carbon into the economy while making better use of carbon that is already circulating. Beyond Decarbonisation Decarbonisation and defossilisation are complementary, but they are not identical. Decarbonisation seeks to reduce greenhouse gas emissions. Defossilisation seeks to reduce dependence on continuous fossil carbon extraction. Many sectors, including aviation, shipping, steel, cement and chemicals, will continue to require carbon-containing molecules for decades to come. The question is whether that carbon must always originate from newly extracted fossil resources, or whether renewable and recycled carbon can increasingly meet those needs. A Systems Perspective The energy transition cannot rely on a single technology. Renewable electricity, hydrogen, batteries, synthetic fuels, carbon capture, energy storage, and advanced industrial processes each have important roles to play. The greatest opportunities will come from integrating these technologies into complete energy systems rather than treating them as isolated solutions. In this context, carbon should increasingly be viewed as a valuable industrial resource that is managed responsibly rather than simply discarded. Why This Matters The next phase of the energy transition is likely to be defined not only by cleaner electricity, but also by more efficient management of carbon resources. Success will depend on reducing reliance on continuous fossil extraction while developing practical pathways for renewable carbon, recycled carbon and sustainable synthetic fuels. This requires innovation, engineering, investment and collaboration across multiple industries. Looking Forward Every major industrial transition begins with a new way of thinking. Electrification transformed manufacturing. Digitalisation transformed communications. Today, the energy transition is challenging us to rethink the role of carbon itself. Defossilisation is not about eliminating carbon. It is about ending our dependence on continuously extracting new fossil carbon and replacing it, wherever practical, with renewable and recyclable carbon within a circular industrial economy. Whether this concept becomes widely adopted will ultimately depend on scientific evidence, engineering demonstration, and commercial success. The discussion has only just begun, and I hope this article contributes to that conversation.