Berlin is reportedly reconsidering its reliance on coal-fired power generation, a move that the UK energy secretary has labelled a potential 'carbon regression' for Europe. This development, if confirmed, would mark a significant reversal for a nation that has long positioned itself as a climate leader.
Germany's Energiewende, or energy transition, has been a flagship policy for decarbonisation. Yet the country's decision to phase out nuclear power, coupled with the ongoing energy crisis triggered by the war in Ukraine, has left it vulnerable to energy shortfalls. In response, Berlin has reactivated mothballed coal plants and is now reportedly exploring longer-term options for coal capacity.
From a physical science perspective, the implications are stark. Coal combustion releases approximately 820 grams of CO2 per kilowatt-hour, more than double that of natural gas and over 50 times that of nuclear or renewable sources. If Germany were to maintain or expand coal usage, it would directly undermine the Paris Agreement emissions trajectories required to limit warming to 1.5 degrees Celsius. The carbon budget for that target is rapidly depleting, and any sustained increase in coal-fired generation would accelerate its exhaustion.
The UK energy secretary's warning is rooted in this scientific reality. Europe cannot afford to backslide on coal while simultaneously pushing for net-zero by 2050. The continent's energy grids are increasingly interconnected, meaning Germany's emissions affect the collective carbon account of the European Union. Moreover, a shift towards coal sends a damaging signal to international markets and investors who are already wary of fossil fuel exposure.
However, the situation is more nuanced than simple regression. Germany's coal reconsideration is a pragmatic response to energy security concerns. The country has reduced its natural gas imports from Russia and faces a potential winter supply crunch. In such circumstances, coal provides a reliable baseload power source that renewables cannot yet guarantee due to intermittency. This is not an ideological preference for coal, but a desperate measure born of geopolitical pressure.
Technological solutions exist to mitigate this regression. Carbon capture and storage could theoretically reduce emissions from existing coal plants, though the technology remains unproven at scale and economically challenging. Alternatively, Germany could accelerate its build-out of renewable energy, storage systems, and grid interconnectors to reduce dependence on coal. The country has already made strides in wind and solar, but bureaucratic hurdles and infrastructure bottlenecks persist.
The broader lesson is that energy transitions are not linear. Setbacks will occur, and the challenge is to minimise their duration and impact. Germany's current path is a reminder that climate action must be coupled with robust energy security and resilience planning. The UK, with its own North Sea gas and nuclear legacy, is not immune to similar pressures.
Ultimately, the question is whether Germany's flirtation with coal is a temporary blip or a harbinger of a wider European reversal. The scientific community, including myself, watches with an uneasy calm. The planet's warming does not pause for geopolitical crises. Every ton of CO2 emitted today makes the future hotter and more unstable. Germany must navigate this crisis without sacrificing the climate. The margin for error is slender.
As data shows, global CO2 emissions need to decline by 45% by 2030 relative to 2010 levels to stay on track for 1.5 degrees Celsius. Any increase in coal usage in Europe, even as a stopgap, moves us further from that goal. The urgency is not alarmist; it is arithmetic. Germany, and Europe, must recalibrate swiftly.
