Decarbonization: The Great Challenge of the 21st Century

Global energy demand continues to rise. Driven by population growth, rapid urbanization, the digital revolution, and, more broadly, emerging economies’ aspiration for better living standards, this demand still relies heavily on fossil fuels. Coal, oil, and Natural Gas account for more than 80% of global energy needs.

Their combustion generates the majority of the greenhouse gases responsible for global warming, and the math is clear: the more their consumption increases, the worse the Carbon Assessment becomes.

A profound transformation of our energy models is now unavoidable. This transformation is called Decarbonization.

Decarbonization literally means “removing carbon.” Thus, by extension, Decarbonization refers to all actions—measures and techniques—aimed at reducing the consumption of fossil fuels and carbon dioxide (CO₂) emissions by a country, an economy, a company, etc. (Larousse)

According to the ADEME, the French Environment and Energy Management Agency, Decarbonization requires an approach based on moderation and efficiency that optimizes energy needs and uses, combined with the replacement of fossil fuels with renewables or electricity from low-carbon energy sources. This approach must be supported by innovation and accompanied by a transformation of production and consumption patterns, particularly in the spirit of the Circular Economy.

In other words, this is an approach aimed at limiting and ultimately offsetting the carbon impact of human activities. It is a fundamental driver of the Energy Transition.

Global warming can no longer be ignored

For several decades, the scientific community has observed an abnormal rise in the planet’s average temperature and has been sounding the alarm. As early as 1938, a British scientist (Guy Stewart Callendar) had observed this increase by compiling the meteorological data available at the time. 

The work of the Intergovernmental Panel on Climate Change (IPCC), established in the 1980s and now widely recognized as the authority on the subject, has confirmed the reality of the phenomenon and demonstrated a significant acceleration since the Industrial Revolution, driven by human activities. And this trend continues today.

In France alone, Météo-France anticipates an average temperature increase of 4 °C by the end of the century. The scientific consensus is clear: global warming has become a major challenge for humanity.

Effects Already Visible

The signs of global warming are already visible, and the disruptions we are seeing today could very well intensify and have more severe and irreversible consequences without immediate action.

• Melting glaciers and sea ice: their mass is decreasing by an average of 267 billion metric tons worldwide each year since 2000;
• Longer and more frequent heat waves and droughts : Between May 2024 and May 2025, nearly half of the world’s population was exposed to at least 30 days of extreme heat, higher than 90% of all temperatures recorded during the 1991–2020 period;
• intensification of rainfall and flooding: as the atmosphere warms, it holds more water vapor, leading to increased precipitation; it is estimated that each additional degree increases the atmosphere’s moisture-holding capacity by 7% (Clausius-Clapeyro equation);
• decline in biodiversity in disrupted ecosystems: the Wild animal populations have declined by about 73% since 1970, not to mention plants and other forms of life on which many socioeconomic activities depend.

The Turning Point of the Industrial Revolution

Human history is closely linked to humanity’s ability to harness energy sources. The first major energy revolution occurred during the Industrial Revolution in the 18th and 19th centuries, with the invention of the steam engine and a massive demand for coal.

This turning point marked the beginning of exponential growth in energy consumption. From that point on, fossil fuels became the primary driver of global economic development. This led to a considerable increase in industrial production, transportation, and services, but at the cost of a surge in greenhouse gas emissions responsible for climate change.

The Internet and Digital Technology

More recently, the latest revolution has been driven by information technologies, which—in just a few decades—have taken center stage in the global economy and the daily lives of the billions of people on this planet. Between the manufacturing of electronic equipment, massive data-processing infrastructures, and the race for technological innovation, the new energy demands are colossal and, in turn, contribute to increasing humanity’s digital Carbon Footprint.

Current Trends

Despite a slight increase in the share of renewables, dependence on fossil fuels remains predominant worldwide.

The IPCC regularly warns that the current situation is incompatible with international climate goals. The panel of experts also emphasizes that profound transformations in energy, industrial, agricultural, and transportation systems are essential to limit global warming to 1.5°C or even 2°C by the end of the century. The IPCC’s latest report estimates that human activity is responsible for more than 95% of the observed warming.

In barely a century, our annual emissions have increased sixfold.

The State and Europe: Establishing a Framework and Goals

At the European level, the 27 member states have adopted the Green Deal, a roadmap for achieving Carbon Neutrality by 2050. This includes the Fit for 55 program, which aims to reduce greenhouse gas emissions by at least 55% by 2030 compared to 1990 levels.

In France, the government, in coordination with European institutions, defines the major policy and regulatory guidelines that chart the course needed to meet its environmental commitments.

France has two tools at its disposal to chart this course:

Local Governments: Allocating Resources for the Benefit of the Region

At their level, local governments (regions, departments, or municipalities) are on the front lines of implementing transition policies. They have significant authority to take action in the areas of land-use planning, sustainable transportation development, Energy Renovation of public buildings, and support for local Renewables.

They guide investments and mobilize local stakeholders to promote a transition that is consistent with the specific characteristics of their region and climate challenges.

Individuals: Consuming Responsibly

Every individual plays a key role in Decarbonization through their everyday choices. They can reduce their household energy consumption (gas, heating oil, or electricity), prioritize sustainable or public transportation, and adopt more sustainable eating habits (less meat, local and seasonal products).

Responsible consumption also applies to the goods we purchase, by favoring products with a low carbon footprint that are durable and recyclable. The accumulation of small individual actions has a significant overall impact, which is further amplified when accompanied by strong public demand directed at government authorities and businesses.

Businesses: Steering Production and Influencing Their Ecosystem

Businesses, particularly manufacturers, have a major role to play in the fight against climate change—both as energy consumers and emitters of greenhouse gases, and as innovators and drivers of transformation. They must define eco-responsibility strategies, optimize their industrial processes to limit emissions, invest in clean technologies, and integrate environmental criteria into their supply chains. They also have significant influence over their partners, suppliers, and customers to promote sustainable practices throughout their entire ecosystem.

France has made achieving Carbon Neutrality a national priority, with resources commensurate with the challenge:

• France 2030: 54 billion euros in investment , 50% of which is dedicated to Decarbonization. The goal: to cut our industry’s greenhouse gas emissions in half within 10 years.
• 2025 Budget: In November 2024, the government introduced an amendment providing for additional support of 1.55 billion euros to implement Decarbonization in industry, proof that efforts are intensifying despite a tight budgetary context.
• Public aid: for individuals, the average investment for Energy Renovation ranges from 15,000 to 25,000 euros per household, partially subsidized by the government (MaPrimeRénov', Energy Savings Certificates, Éco-prêt à taux zéro).

According to a needs assessment published in the report by the Directorate General of the Treasury, the decarbonization of the French economy will require between 55 and 130 billion euros per year by 2030.

However, these amounts remain well below the cost of inaction , since every degree of warming avoided represents massive savings in terms of climate damage, public health, and adaptation.

The Reinvention of Energy Companies

Traditional energy companies face a real economic paradox. How can these companies, built on the sale of large volumes of energy, support a move toward energy conservation? They must now rethink their strategy and completely transform their business model by balancing environmental responsibility with profitability and competitiveness.

This transformation involves three major shifts:

1. Selling less energy by actively encouraging Energy Sobriety among their customers, developing revenue models decoupled from sales volume, and supporting a reduction in the number of consumers;

2. Selling a different kind of energy by gradually replacing fossil fuels with renewables, adapting existing infrastructure to new energy sources, and investing heavily in the technologies of the future;

3. Create new services by offering Energy Efficiency consulting and personalized support, developing smart consumption management tools, and providing solutions for facility maintenance and optimization.

Wide-ranging influence

The role of energy sector stakeholders and the close relationship this role affords them with all their stakeholders make their contribution indispensable to the transition to more responsible, sustainable, and carbon-neutral production and consumption patterns.

Government agencies and ADEME encourage their actions and support them. ADEME, for example, proposes key areas of focus for Decarbonization, providing a pragmatic roadmap for both these energy sector players and their ecosystem:

• Energy Sobriety: identifying and reducing unnecessary or excessive consumption;
• Energy Efficiency : improve the performance of equipment, buildings, and industrial processes;
• Renewables: develop a variety of renewable energy sources to replace fossil fuels.

Why a range of solutions?

1. Because energy needs are diverse

Heating a Single-family House in a rural area, powering a steel blast furnace, running a heavy-duty truck, or heating a dense urban neighborhood: each application has its own technical and economic characteristics.

2. Because regional constraints vary

Solutions cannot be the same for dense urban areas where district heating networks are efficient, rural areas rich in local Biomass, industrial zones with high-temperature requirements, or coastal regions with their offshore wind potential.

3. Because each energy source has its own technical limitations

• Electricity: excellent for many uses but difficult to store on a large scale seasonally;
• solar and wind power: renewables but intermittent;
• Biomass: renewable but with geographically uneven resources;
• hydropower: potential already largely exploited in France.

4. Because the required investments must be kept under control

To transition the energy system toward Carbon Neutrality, it is essential to leverage all available tools; otherwise, the cost of Decarbonization could prove to be very, very high. A comparison of two infrastructure strategies speaks volumes:

• full electrification of the energy system: 250 to 350 billion euros;
• adaptation of gas networks for Renewable Gas: 3 to 10 billion euros.

This significant difference illustrates the value of a multi-energy approach that optimizes investments by leveraging existing infrastructure.

Institutional perspectives are converging

The High Council for Climate, the OECD, and the Institute for the Advancement of Global Decarbonization advocate a diversified approach that optimizes costs by leveraging existing infrastructure, tailors solutions to regional specificities, ensures Security of Supply by diversifying sources and accelerates the transition by mobilizing all available levers.

The Rise of French Green Gas

Gas represents a viable path toward Carbon Neutrality in the use of… gas. Renewable gases such as Biomethane, a Green Gas, can be used to achieve decarbonization in buildings, https://justdecarb.grdf.fr/le-BioNGV-ce-Green Gas-qui-decarbone-les-transports">transportation and reindustrialization-and-decarbonization-a-challenge-within-our-reach">industry.

In France, the sector continues to gain momentum, and the figures speak for themselves: with nearly 800 Anaerobic Digestion plants feeding their output into the grid and 6 to 7 new plants undergoing commissioning each month, installed capacity now stands at 15 TWh, equivalent to roughly three nuclear reactors.

Looking back, these figures paint a promising picture for the growth of French Biomethane:

• 2023: 12 TWh produced (double the initial target set in the PPE)
• 2030: target of 44 TWh
• 2035: projected 85 TWh (45% Renewable Gas in the networks)

Given the country’s Biomass potential, Green Gases could cover 100% of France’s needs by 2050.

Beyond Decarbonization: The Circular Economy

Green Gases initiate a virtuous cycle that creates value and environmental benefits for communities. In addition to providing an energy source that meets the region’s needs, Green Gases represent:

• 4,000 local jobs that cannot be outsourced;
• the recovery of organic waste generated within the region;
• the production of digestate, a natural fertilizer for agriculture;
• a reduction in dependence on energy imports.

While Decarbonization goals are now clearly defined at the international level, the path ahead remains complex and fraught with obstacles. It requires colossal collective efforts, substantial investments, and a profound transformation of our lifestyles.

It is essential to step up information, education, and Awareness Raising efforts, while strengthening international Cooperation and economic regulation to align interests around common climate goals.

In France, as around the world, Decarbonization calls for a pragmatic approach that harnesses all available solutions. No single solution can claim to achieve decarbonization for all uses on its own. Electrification, Renewable Gas, Biomass, Solar, and Wind—each energy source has its place depending on the region, the application, and economic constraints.

The complementarity of energy sources, far from being a compromise, is the most direct path to Carbon Neutrality by 2050.