What is the energy transition?

The energy transition is a major structural change to energy supply and consumption in an energy system, with a current transition underway to sustainable energy to limit climate change.

According to the International Renewable Energy Agency (IRENA), it represents a gradual and steady shift of global energy use from fossil-based sources to a zero-carbon system by 2050.

The current transition aims to reduce greenhouse gas emissions from energy quickly and sustainably, mostly by phasing down fossil fuels and changing as many processes as possible to operate on low carbon electricity.

Key Points

• The energy transition involves moving from coal, oil, and natural gas to renewable sources like solar, wind, hydropower, and biomass
• It encompasses not just electricity generation, but also transportation, heating, and industrial processes
• Grid modernization and energy storage technologies are essential to managing the intermittent nature of renewable energy
• Electrification of end-use sectors is a core strategy, making the power sector the backbone of the entire energy system
• The transition addresses climate change while also improving energy security and creating economic opportunities

Understanding the Energy Transition

Fossil fuels have been the dominant energy source, but they are responsible for more than 75 percent of global greenhouse gas emissions because they emit greenhouse gases that accumulate in the atmosphere and trap the sun's heat. The energy transition represents a fundamental transformation in how societies power homes, businesses, and industries.

A previous energy transition occurred during the Industrial Revolution from 1760 onwards, from wood and other biomass to coal, followed by oil and later natural gas. Today's transition differs in that it is driven by the urgent need to address climate change rather than simply seeking more efficient or abundant energy sources. The energy transition is the main tool in a broader strategy adopted by governments to contain global warming to 1.5°C above pre-industrial levels by mid-century, necessary to reduce energy-related CO2 emissions from fossil fuels that scientific research confirms are a key factor in climate change.

The transition involves the coexistence between strong expansion of renewables, continued increase in global energy demand, and persistent dependence on fossil fuels, with geopolitical tensions, constraints on the supply of critical minerals, and electrical integration challenges making it clear that the energy transition is dynamic and heterogeneous.

How It Works

The energy transition operates through several interconnected mechanisms:

1. Renewable Energy Deployment: The development of renewable energy lies at the heart of the energy transition, with photovoltaics and wind power joining mature technologies such as hydroelectric and geothermal power and establishing themselves as major players in the ongoing transition. These technologies generate electricity without burning fossil fuels, eliminating direct carbon emissions from power generation.

2. Electrification of End Uses: The power sector becomes the backbone of the entire energy system, due to more intense electrification induced sector coupling.

The transition involves not only generating electricity from renewables, but also transforming other sectors, like transportation and heating, to use clean energy. This means replacing gasoline vehicles with electric vehicles, gas furnaces with heat pumps, and fossil fuel-based industrial processes with electric alternatives.

3. Energy Storage Integration: Storage technologies, such as energy storage systems that are capable of compensating for the intermittency of sources such as the sun and wind, will be decisive.

Both wind and solar energy sources face the challenge of intermittency, and without proper energy storage solutions, they cannot consistently supply power during peak demand, making the integration of wind, solar, and energy storage the optimal solution to stabilize renewable energy output and enhance grid reliability.

4. Grid Modernization: Grid congestion poses a growing risk to energy security and energy transitions, requiring action across several fronts.

Energy facilities integrating renewables or storage face several challenges, starting with aging infrastructure that wasn't designed for two-way power flows. Upgrading transmission and distribution infrastructure is essential to accommodate distributed generation and manage variable renewable energy flows.

5. Efficiency Improvements: Electrification and integration of sectors enables additional flexibility, leading to more efficient systems and lower energy supply cost. Electric technologies are inherently more efficient than combustion-based alternatives, reducing overall energy demand even as useful energy services increase.

Why It Matters

The energy transition is critical for multiple reasons beyond climate change mitigation. Transitioning to renewable energy offers numerous benefits including promoting cleaner air and water, improving public health, reducing healthcare costs, and providing long-term energy security by reducing reliance on volatile fossil fuel markets, while creating new economic opportunities by generating jobs and supporting a more resilient and equitable energy system for future generations.

Industrial and economic policy are now the main levers for energy transition policies, with governments focusing on industrial policy—local-content rules, tax credits, subsidies and trade measures—to achieve economic and strategic goals. The transition has become a competitive race among nations to secure the industries and jobs of the future in clean technology manufacturing, battery production, and advanced energy systems. Affordability must be treated as a core pillar of the transition—an energy system that is clean but unaffordable will fail to gain public support and undermine long-term climate goals.

Related Terms

• Decarbonization: The process of reducing carbon dioxide emissions from energy systems and industrial processes, primarily through the elimination of fossil fuel combustion and the adoption of renewable energy sources.

• Electrification: The replacement of technologies and processes that use fossil fuels directly with electric alternatives powered by renewable electricity, such as replacing gas vehicles with electric vehicles or gas heating with electric heat pumps.

• Grid Congestion: A condition where electricity transmission and distribution infrastructure lacks sufficient capacity to accommodate energy flows, creating bottlenecks that can delay renewable energy project connections and threaten energy security.

• Sector Coupling: The integration of different energy-consuming sectors (electricity, heating, transport, industry) through electrification and shared infrastructure, enabling greater system flexibility and efficiency.

• Intermittency: The variable and unpredictable nature of renewable energy sources like solar and wind, which generate electricity only when environmental conditions permit, requiring storage and grid flexibility to ensure reliable power supply.

Frequently Asked Questions

How fast is the energy transition happening?

Solar and wind are now expanding fast enough to meet all new electricity demand, a milestone reached in the first three quarters of 2025.

Solar, wind, and batteries are scaling at extraordinary speed and will do most of the work in the transition. However, the pace varies significantly by region and sector, with electricity generation transitioning faster than transportation and heavy industry.

What are the biggest challenges facing the energy transition?

The growing backlog of renewable energy projects awaiting grid connection highlights the importance of developing infrastructure, with more than 3,000 gigawatts of renewable energy projects, where more than 1,500 GW are in advanced stages, queuing globally and constituting a substantial barrier in the transition to net-zero emissions. Other major challenges include the intermittent nature of renewable sources, aging grid infrastructure, supply chain constraints for critical minerals, and ensuring affordability and equity throughout the transition process.

Will fossil fuels disappear completely?

Despite the advance of renewables, global demand for fossil fuels remained growing in 2025, reinforcing that even with the transition underway, modes of difficult electrification will continue to depend on liquid fuels.

Hard-to-electrify aviation and maritime sectors will also move away from oil dominance to a more diversified and decarbonized fuel mix. The transition is gradual, with some sectors requiring longer timelines to fully eliminate fossil fuel dependence.

Last updated: June 17, 2026. For the latest energy news and analysis, visit stakeandpaper.com.