Air Conditioning in Europe: A Growing Concern in the Climate Crisis
Air conditioning (AC) contributes to a “vicious heating cycle,” exacerbating the climate crisis as its use rises alongside global temperatures. While Europeans rely less on AC compared to other parts of the world, its adoption is steadily increasing due to rising heatwaves driven by human-induced climate change.
Rising Use of Air Conditioning in Europe
Since 1990, the number of AC units in Europe has more than doubled, with the demand for cooling quadrupling, particularly in northern regions. According to the International Energy Agency (IEA), in 2016 the European Union had about 96.5 million units—far fewer than countries like China or the United States. Per capita, the EU had just 20 units per 1,000 inhabitants compared to the US’s much higher penetration rate of 90%.
By 2022, 19% of European households used AC, and the IEA projected this figure would rise significantly, with 130 million units installed by 2023 and the potential for quadrupling by 2050. Unlike in the US or China, AC in Europe is more common in commercial buildings than residential homes, though domestic installations are increasing rapidly.
Barriers to Adoption
Air conditioning is often seen as a luxury due to high installation and operating costs. Studies show that wealthier households and countries are more likely to adopt AC systems, a trend that is accelerating.
Environmental Impact of Air Conditioning
Air conditioning significantly contributes to greenhouse gas emissions, consuming vast amounts of energy and emitting approximately one billion tonnes of CO₂ annually—about 2.7% of global emissions.
Clara Camarasa, an IEA expert, highlights the broader environmental challenges:
- Energy inefficiency: Rapid adoption often leads to the use of energy-intensive systems.
- Refrigerants: Certain AC units use refrigerants with high warming potential, harmful to the ozone layer.
- Urban heat islands: AC systems release heat into cities, exacerbating nighttime temperatures and creating a feedback loop that drives further AC usage.
In Paris, for instance, simulations indicate that a nine-day heatwave with widespread AC use could raise nighttime temperatures by 2.4°C, perpetuating a cycle of reliance on cooling systems.
Balancing Necessity with Sustainability
Air conditioning can be a lifesaver during extreme heat, reducing heat-related deaths by 75% in households that use it. Experts agree, however, that reliance on AC alone is unsustainable.
Robert Dubrow of Yale University emphasizes the need for efficient cooling systems, improved insulation, and nature-based solutions like green spaces and green roofs to mitigate urban heat islands.
Camarasa echoes this, suggesting that prioritizing reversible heat pumps and investing in sustainable urban planning can reduce energy demand while maintaining safe and comfortable living conditions.
The path forward lies in balancing the necessity of air conditioning with the imperative to address its environmental impact through smarter technologies and urban strategies.