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June 2021

A systemic approach to the energy transition in Europe

There are many possible pathways towards a carbon-neutral future. Achieving it by 2050 is possible, but this requires urgent action.

But this is not just a technical challenge. To make the energy transition a reality, we need to solve a huge systemic problem, coordinating countless individual voluntary decisions on investment, consumption and behaviour across Europe.

This means transforming the entire European energy system — a change which will affect every part of our society and require huge investment during the transition. It must be done in a socially equitable way. And we already need to accelerate progress if we want to achieve the EU’s target of net zero emissions by 2050.

Many different policy options must be evaluated for their potential to deliver emission targets, as well as their economic efficiency and the contribution they make to maintaining social balance.

Using these criteria, the best available evidence points to six main themes:

  • Technological diversity: Huge global investments in technology will be needed in the coming decades. But in general it is often difficult to predict the winning technologies of the future. So, rather than searching for a single silver bullet, Europe must develop and deploy a broad range of technologies while maintaining common, EU-wide goals. This is important not only to create a dynamic and flexible energy system, but also because different countries in Europe have different structures and needs.
  • Managing deep complexity: We must find new ways to balance supply and demand in a complex energy system that includes variable sources such as solar and wind power. Electrification, new infrastructure, energy efficiency, demand management, and innovative uses of data can all help to manage this complexity. For hard-to-decarbonise sectors, such as long distance transport and heavy industry, there are alternatives to direct electrification, such as green hydrogen fuels.
  • Governance and regulation: We need a strong carbon pricing mechanism as part of a mixture of regulatory measures and incentives. The existing European Emissions Trading System should be extended to all relevant sectors, including transport and heating/cooling, and political leaders should commit to very high carbon prices by the middle of the century, reflecting the full environmental impact of greenhouse gases. Revenues raised in this way should be used to support a fair transition, to ensure that no-one is left behind.
  • Behaviour and participation: Facilitating public behaviour and action at multiple levels is just as important as developing new technologies. In the energy system of the future, actions at individual, household, local and regional levels will play a central role in supporting energy generation and shifting patterns of use.
  • Global leadership: The EU is well placed to take a global lead in reducing emissions in a way that is economically efficient and socially equitable, while maintaining competitiveness. Europe must strengthen its diplomatic efforts to ensure that the Paris Agreement is followed by everyone, and to account for the emissions which are generated by goods imported into Europe. Reciprocal commitments from other countries will be more effective than overachieving in Europe alone.
  • Supply chain security: We must manage the global supply of materials needed to support clean energy technologies. Our dependency on imported fuels will decrease as we transition to green energy, but we must actively promote innovation, development and circular economy within Europe, or else we will end up with new dependencies on the imported materials that we need.

Scientific advice

Delivery date

29 June 2021

Supports EU mission

Adaptation to climate change
Climate-neutral and smart cities

Supports UN sustainable development goals

Affordable and clean energy
Sustainable cities and communities
Responsible consumption and production
Climate action


The Group of Chief Scientific Advisors responds to the request for advice from the European Commission.

Their policy recommendations are based on the best available scientific evidence.

Energy transition SO cover
Bibliographic information
Cite as
European Commission, Directorate-General for Research and Innovation, Group of Chief Scientific Advisors, (2021). A systemic approach to the energy transition in Europe : scientific advice to strengthen the resilience of the European energy sector, Publications Office.
The Scientific Opinion is written jointly by the Group of Chief Scientific Advisors. Former Advisors (‘alumni’) may also contribute.
Portrait of Elvira Fortunato

Elvira Fortunato

Portrait of Nicole Grobert

Nicole Grobert

Portrait of Rolf-Dieter Heuer

Rolf-Dieter Heuer

Portrait of Carina Keskitalo

Carina Keskitalo

Portrait of Éva Kondorosi

Éva Kondorosi

Portrait of Maarja Kruusmaa

Maarja Kruusmaa

Portrait of Eric Lambin

Eric Lambin

Portrait of Alberto Melloni

Alberto Melloni

Portrait of Nebojša Nakićenović

Nebojša Nakićenović

Portrait of Eva Zažímalová

Eva Zažímalová



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