Stopping Climate Change: Technological Optimism or Political Realism?
News from Germany last week once again laid bare the deadlock in climate policy. Germany's Expert Council on Climate Change officially declared that the federal government will be unable to meet its 2030 and 2040 climate targets under current policies. Legally binding commitments sit on paper while the energy, transport, and buildings sectors fall persistently short. According to the independent council, an overshoot of between 60 and 100 million tonnes of CO₂ equivalent is expected within the country's carbon budget.
For many, the news came as no surprise. Germany has long positioned itself as a climate leader. Yet the CDU/CSU-SPD coalition formed after the 2025 elections has made economic recovery its priority and is seeking to roll back its predecessor's climate agenda. Voters were decisive in shaping that choice: high energy prices, industrial decline, and the perceived cost of the "green transition" translated into real electoral consequences.
The German case is a microcosm of a far broader tension in the fight against climate change.
Behind this shift lies a powerful dynamic: the collapse in the cost of renewable energy. Solar power has become more than 90 % cheaper over the past 15 years. The world spent $1.1 trillion on clean energy technologies in 2022, nearly double the $600 billion of 2020. The energy transition appears to be advancing, at least in part, through market dynamics that outpace political decisions.
Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research welcomed Hausfather's analysis. One of Germany's most influential climate scientists, Rahmstorf, described the development as "a success of the global energy transition." The worst-case scenario being left behind is a genuine achievement.
But Rahmstorf immediately added the critical caveat: "The emissions curve has flattened. Now it needs to fall — rapidly."
This is precisely where the deep tension between technological optimism and political realism makes itself felt.
Carbon dioxide in the atmosphere is a cumulative phenomenon. The planet continues to warm until emissions reach zero. Saying "we are no longer getting worse as quickly" is not the same as saying "we are improving" — it means only "we are getting worse more slowly." This is the brutal arithmetic of climate science.
The "flattening" that Hausfather and Rahmstorf point to, therefore, represents real progress, but it is not what is needed to meet the 1.5°C or 2°C targets. Even under current policies, the best estimate is roughly 2.6°C of warming by 2100 — a world far beyond what the Paris Agreement envisioned. And if we are unlucky on climate sensitivity and carbon cycle feedbacks, that figure could approach 4°C.
Rahmstorf himself applies this critique to his own country: "We are seeing a terrible backsliding in the United States, and to a lesser extent in Germany as well." Those words carry even greater weight when read alongside the German news.
Germany is not just one country in this debate — it is a test case. If one of the world's wealthiest, most institutionally robust, and most rhetorically "green" democracies cannot honour its legally binding commitments, this points to systemic failure.
What makes it worse is that those commitments are already below what science requires. Germany is not targeting net zero by 2030; it is targeting a 65 % reduction in emissions relative to 1990 levels. And it is failing even that. The independent council's warning is unambiguous: even if the current action plan is implemented in full, none of the 2040 climate targets will be met.
Why? Not technical incapacity. Germany has the renewable energy capacity, the technology, and the financing. The problem is political. The new coalition is softening building renovation standards, loosening energy efficiency requirements, and placing short-term economic calculations ahead of long-term climate obligations. As council chair Barbara Schlomann noted, the assumptions embedded in existing calculation models no longer match realities on the ground. Even the data is being shaped by political considerations.
The core of Hausfather and Rahmstorf's optimism is this: renewable energy costs are falling, and this market dynamic operates independently of political will. Even if a government slows down, markets can sustain the transition.
There is truth in this argument. But it overlooks a critical factor: rising energy demand.
AI data centres, electric vehicles, industrial electrification — global electricity demand is set to rise dramatically over the coming decade. IEA projections make the scale of this increase clear. If renewable capacity cannot keep pace with new demand, fossil fuels will continue to fill the gap. Keeping the emissions curve flat requires all new demand added each year to be met entirely by renewables. That is not currently happening.
In Germany specifically, this contradiction is particularly sharp. The country exited nuclear power, decommissioning existing low-carbon generation before renewable capacity could fill the void. Dependence on coal is declining more slowly than expected. And the new coalition is weakening the very policies that would accelerate the transition. Technology is getting cheaper, but grid infrastructure, storage systems, and permitting processes are not keeping up, while political obstacles are actively applying the brakes.
To understand why Germany's shift is not merely a European problem, we need to look at how global climate policy actually functions.
Developing countries shape their climate policies largely by leaning on two things from wealthier nations: leadership and coercive power. These two pillars are inseparable. Leadership carries the message of "we are doing this — you should too," while coercive power means that message is backed by concrete economic and legal consequences.
Turkey offers one of the most tangible illustrations of this dynamic. Behind the passage of Turkey's long-delayed Climate Law in 2024 lay many factors, but the decisive one was external: the European Union's Carbon Border Adjustment Mechanism (CBAM). By linking access to the EU market directly to carbon pricing for exporters in carbon-intensive sectors — iron, steel, cement, aluminium, fertilisers, and electricity — the mechanism pushed Turkey into action. In other words, Turkey's climate legislation was born not from internal political dynamics but from the economic necessity created by the EU.
This pattern is not unique to Turkey. Across South Asia and Africa in particular, many developing countries are shaping their climate policies primarily in response to external financing conditions, export market requirements, and international pressure. Domestic political will tends to play a secondary role.
This is precisely where the global reverberations of Germany's shift come into play.
The first effect is legitimacy erosion. When Germany cannot meet its own targets, the message to developing countries — "you too must transform" — falls on empty air. The question "You cannot do this yourselves, so why are you dictating to us?" is increasingly heard at negotiating tables. Much of the tension at COP summits flows directly from this legitimacy gap.
The second effect is the weakening of coercive mechanisms. The long-term functioning of instruments like CBAM depends on the EU meeting its own carbon reduction targets. If major EU economies, Germany chief among them, drift steadily away from their commitments, the legal robustness and political legitimacy of such mechanisms will come under challenge. For developing countries, this may look like breathing room — but it is in fact a harbinger of the unravelling of global climate governance.
The third effect is the darkening of financing commitments. Developed countries pledged $100 billion per year to support the green transition in developing nations. That figure was already considered inadequate, and meeting it has proven elusive. When countries like Germany cut their domestic climate spending, pressure mounts on international financing commitments as well. The external resources available for Turkey's or India's green transition are growing increasingly uncertain.
The fourth, and perhaps deepest, effect is the reversal of the model effect. When policymakers in developing countries told their voters "we can do this transition," they frequently pointed to the German model. Germany's Energiewende — its energy transition — had become the symbol of what was politically possible. That symbol is now cracked. "If the best-in-class can't manage it, why should we?" is becoming an increasingly powerful argument against climate advocates in legislatures around the world.
For Turkey specifically, a concrete question arises: if CBAM pressure eases, or if the mechanism is partially suspended, what happens to the pace and scope of the Climate Law's implementation? In an environment where external coercive power weakens, will domestic political will prove sufficient to fill the void?
The answer to that question matters not just for Turkey but for dozens of countries in similar positions. As long as developing countries have not internalised their climate policies — as long as they would not choose this transition in the absence of external pressure — global climate governance will remain fragile. Germany's current hesitation makes that internalisation harder still.
Hausfather and Rahmstorf see the technology. That is a correct observation. But completing the picture requires seeing the politics and the rising demand as well.
For the curve to "fall rapidly," the following conditions are needed: hundreds of gigawatts of new renewable capacity added each year on top of what already exists; parallel expansion of grid infrastructure; deep structural transformation in the buildings, transport, and industrial sectors; and behind all of this, sustained and consistent political will.
Germany is wavering even on that last condition. And when Germany wavers, as we have seen, the effects do not stay within its borders: they weaken the hand of climate advocates in developing countries, erode the legitimacy of coercive mechanisms, and cast a shadow over financing commitments.
Being genuinely hopeful does not mean ignoring technological progress — it means refusing to ignore the collision between that progress and political reality. The flattening of the emissions curve is a real achievement. But the German case shows how fragile that achievement is, and how quickly it can be reversed when political winds shift.
Rahmstorf's warning still stands: the curve has flattened; now it needs to fall rapidly. But neither in Germany nor across most of the world is the political will that would make such a fall possible currently in evidence.
This is not pessimism. This is data-driven realism.
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