Clean Tech Market Set to Hit $3 Trillion by 2035: What Europe Must Do to Lead the Charge

The global clean technology market is on track to more than double in size, reaching $3 trillion by 2035 — a landmark projection from the International Energy Agency (IEA) that underscores just how rapidly the energy transition is reshaping economies worldwide. Driven by surging investment in renewable energy generation and energy efficiency, this growth is no longer simply an environmental story. It is, increasingly, a story about economic security, industrial competitiveness, and who will dominate the technologies of tomorrow.

For Europe, a continent that has spent the past three years grappling with energy price volatility and supply chain disruptions, the message is both an opportunity and a warning: the window to lead in green technology is wide open — but it will not stay that way indefinitely.

A Global Race Already Underway

The IEA’s forecast does not exist in a vacuum. Across the world, countries and companies are already accelerating their positions in the cleantech race. Spain has doubled its solar and wind capacity in recent years, using renewable expansion as a direct shield against fossil fuel price swings — a model the We Mean Business Coalition highlights as a blueprint for energy security. Australia’s national grid has crossed the 50% renewables threshold, powered in part by a remarkable boom in rooftop solar and home battery storage.

In the United States, geothermal energy is emerging as a serious contender for 24/7 clean energy supply. Fervo Energy, which has raised $462 million and is filing for an IPO, is among the companies named by TIME in its top US GreenTech firms of 2026. Meanwhile, solar firm Sunrun is advancing vehicle-to-grid technology in partnership with Ford and Tesla — a development that blurs the line between electric mobility and grid infrastructure, turning EV batteries into distributed storage assets that stabilise electricity networks and reduce costs for citizens.

These are not isolated experiments. They represent a structural shift in how energy systems are designed, financed, and operated — and they carry direct lessons for European policymakers and investors.

Europe’s Grid: The Critical Bottleneck

Europe’s energy transition faces a challenge that no amount of solar panels or wind turbines can solve on its own: the grid. At the J.P. Morgan Clean Tech Stars 2026 conference, industry leaders identified grid upgrades, battery storage, and flexible demand management as the defining priorities for European energy resilience over the next decade. The urgency is compounded by a rapid rise in electricity demand from data centres and the broader electrification of industry and transport — sectors that are central to Europe’s smart cities and industrial decarbonisation agendas.

The good news is that solutions are advancing quickly. The UK recently brought online its first deep geothermal plant, capable of powering 10,000 homes with stable, emissions-free heat and electricity — a technology that could prove transformative for urban energy systems across Northern Europe. Further into the future, a UK government study by DESNZ suggests that space-based solar power could become cost-competitive by 2040, potentially delivering clean electricity around the clock, independent of weather or season.

On the corporate side, green innovation is increasingly tied to business strategy. Companies including Nike and Mitsui have signed major solar power purchase agreements (PPAs), while global initiatives like EV100 and RE100 continue to grow. Industrial players are also making tangible progress: ABB has reported a 97% reduction in operational emissions, demonstrating that deep decarbonisation in heavy industry is achievable at scale.

Implications for Citizens, Businesses, and Policymakers

The $3 trillion cleantech market projection is not an abstract number — it translates into jobs, lower energy bills, cleaner air, and greater geopolitical independence. For European citizens, the expansion of renewables and storage means more stable electricity prices and reduced exposure to the kind of fossil fuel shocks that defined 2021–2023. For businesses, early adoption of clean technologies is becoming a competitive advantage, not just a compliance requirement.

For policymakers, the priorities are clear:

• Accelerate grid investment to absorb growing renewable capacity and meet rising demand from electrification and AI infrastructure.
• Support emerging technologies — geothermal, long-duration storage, and vehicle-to-grid — that can provide the flexibility and reliability that variable renewables alone cannot.
• Create stable, long-term policy frameworks that give investors and industries the confidence to commit capital at the scale the transition requires.

The key takeaway: The energy transition is no longer a future scenario — it is the present economic reality. With the global cleantech market poised to reach $3 trillion within a decade, Europe has both the industrial base and the policy ambition to be a world leader. The challenge now is execution: faster grids, smarter cities, bolder investment, and the political will to match the scale of the opportunity.