As energy insecurity returns to global policy discussions, air quality goals risk being pushed aside by the urgent demand for affordable and reliable power.
Squinting at the headlines today, it might appear that time has traveled backward. The world is confronting an energy crisis that feels eerily familiar to anyone who remembers the long gas lines and thermostat wars of the 1970s. Back then, a geopolitical shock sent the price of fossil fuels skyrocketing, and the Western world confronted a sobering realization — the power once taken for granted was a finite, fragile lifeline. From that panic, a new global imperative was born: energy efficiency.
In the 1970s, fossil fuel scarcity forced the world to embrace energy efficiency while air quality was pushed to the periphery. Today, a hauntingly similar reality has emerged, a pervasive fear that the urgent pursuit of survival can once again cause air quality to be pushed down the list of global priorities.
The Doctrine Of Doing More With Less
During that original crisis, efficiency was not just a suggestion, it was an economic survival strategy. Gas-guzzling muscle cars were traded for compact imports, homes were insulated with newfound urgency, and turning off lights became a way of life. Over the next few decades, energy efficiency transitioned from a panic response into a core doctrine. It became deeply embedded in building codes, appliance ratings and corporate standards. Every step taken was engineered to use a little less power, creating a world where doing more with less was the standard operating procedure.
But as the decades rolled on, priorities shifted. The world stopped worrying quite as much about the immediate scarcity of energy and started worrying about the atmospheric consequences of its use. Air quality and decarbonization became pressing issues in global policy, shaping a future that prioritized the sky over the socket. Until today.
The Return Of The Crisis
Welcome back to the 1970s. Global conflicts, fractured supply chains and volatile markets have thrust us back into an era of energy insecurity, fundamentally reshaping the trajectory of our future. The grid is strained, utility bills are exorbitant, and the fear of winter blackouts has returned to the public consciousness. Just like that, the hierarchy of needs has reasserted itself. When faced with the immediate threat of industrial paralysis or homes without heat, long-term environmental goals are abruptly forced to take a back seat as we reach for the nearest lifebuoy.
When the choice is between burning dirty fuel and freezing in the dark, governments often choose the former to sustain day-to-day operations. Cracks are already showing in the transition strategy: nations that once prided themselves on embracing sustainable technologies are now pausing the phase-out of fossil fuels and considering bringing retired coal-fired power plants back online. Regulations are being bypassed, and the pursuit of raw, reliable power is once again overriding the quest for pristine air and the momentum that once drove environmental priorities.
The Paradox Of Protection:Air Quality In The Crosshairs
The irony of this retreat is most visible in urban centers. As cities revert to dirtier energy sources to keep the wheels of the economy turning, the quality of the breathable air inevitably degrades. This triggers a dangerous feedback loop involving the very technologies designed to protect us. Modern public health, particularly in dense urban environments, now relies heavily on advanced air filtration and purification. To make city air safer to breathe, public health depends heavily on heavy-duty HVAC systems (see Figure 1) and high-efficiency filters (see Figure 2).
However, these systems do not exist in a vacuum. The manufacturing and logistics of these filters, along with the specialized machinery required to house them, represent an incredibly energy-intensive industrial process. Furthermore, the operational cost of running large-scale filtration systems to scrub pollutants from schools, hospitals and offices requires a massive, constant draw of electricity. Herein lies the paradox of the 2020s: to protect public health from the deteriorating air quality caused by an energy crisis, even more energy must be consumed to capture or reduce the emissions being continuously produced. If the power grid falters or if electricity simply becomes too expensive to afford, the very systems that ensure the air is safe to breathe are the first to be throttled or shut down. Limited power is being used to mitigate the side effects of how that power was generated in the first place.
The Execution Gap:Precision Versus Promises
While the intention to enhance air quality both outdoors and indoors may be genuine, practical realities create a vicious circle. It is difficult to achieve tangible results when the tools lack precision. Broad filtration selection methods, classification systems and performance metrics often miss the mark in accounting for the complex physicochemical properties of real-world aerosols (see Figure 3), while and strategic plans lack actionable road maps. This technical shortfall is further compounded by an industry that too often treats air quality challenges as commercial opportunities. By clinging to outdated approaches in the design and operation of heating, ventilation and air conditioning (HVAC) systems and by prioritizing profit-driven business models, the bigger picture is lost. A wider lens is urgently needed — one that, at the very least, recognizes that technologies for optimal indoor air quality must be accessible and affordable. Consequently, collective actions lag far behind the universal promise of clean air, a goal that remains frustratingly unattainable when metrics for success are vague, knowledge is incomplete and implementation is dictated by commercial interests rather than equitable public health.
a single filter fiber. (above right): Energy Dispersive X-ray Spectroscopy (EDS) characterizing the elemental composition
of captured airborne pollutants.
Without precise data and a clear path forward, the desire for cleaner air remains an aspiration rather than a measurable outcome. The result is a cycle where the ambition is high, but execution is stalled by technical, logistical and scientific gaps.
The Bitter Pill: Losing Momentum
Are these recurring power crises permanently impeding the ability to propel air quality in the right direction? Evidence suggests they may be. Every time a scarcity event occurs, the momentum of environmental progress stalls. Resources originally earmarked for clean innovation are diverted into emergency subsidies for fossil fuels. The capital required to maintain and upgrade air purification infrastructure is instead swallowed by the rising cost of the raw electricity needed just to keep the status quo.
Now And Then
The current moment is delivering a harsh lesson in pragmatism. Just as the 1970s taught efficiency through desperation, the 2020s are proving that filtered air cannot be taken for granted. Rather, it is a resource that demands a stable, affordable energy foundation. Until the alternative energy infrastructure becomes as robust and reliable as the fossil fuel systems it is intended to replace, air quality and public health will remain high-stakes chips on the table of the global energy market. In many ways, the 1970s have returned. The question now is how long it will take to find a way out this time.
