There is an unfamiliar quiet over this part of East Anglia at the moment. Those of us who live within earshot of RAF Lakenheath become accustomed to the sound of military aircraft as part of the landscape: F-15s and F-35s announcing their arrival and departure with customary exuberance.
The familiar response to the noise is that it is “the sound of freedom.”
There is truth in that phrase. Open societies remain open because people dedicate themselves to protect them. Military capability has a cost, and any serious discussion of defence has to begin by accepting that security cannot be provided without expenditure.
But the present quiet has made me think more carefully about what else that sound represents.
For much of my adult life, the environmental argument has been framed through personal responsibility. We have been encouraged to understand that small private decisions matter when multiplied across millions of people: how often we fly, what we drive, how we heat our homes, what we eat, what we consume, whether we repair or replace
The principle is reasonable. An environmental problem created cumulatively must, in part, be addressed cumulatively. There is something civilised about accepting that private behaviour can have public consequences.
The difficulty comes when that carefully cultivated economy of individual responsibility is placed beside the scale of the modern state.
An aircraft such as the F-35 can burn roughly five thousand litres of fuel in an hour, producing something in the region of thirteen tonnes of CO₂. The average British consumption-based greenhouse-gas footprint is roughly ten tonnes of CO₂ equivalent per person per year. The accounting categories are not identical, and the comparison should not pretend they are. Nor does a military aircraft exist for the same purpose as a household, a car or a holiday flight. But the scale is revealing.
In crude terms, an advanced combat aircraft can move through the greenhouse-gas equivalent of an ordinary citizen’s annual consumption in under an hour. Extend the same comparison across a contemporary British lifetime and the equivalent is reached not in decades, but in roughly 48 hours
That’s it. A working lifetime’s CO₂, 65 years of consumption. In two days.
The conclusion should not be that we do not need military aircraft. We do.
Nor should it be that individual environmental responsibility is meaningless. It is not.
The more interesting question is why we have become so comfortable applying one moral language to individuals and another to most energy-intensive systems operated in our collective name.
Perhaps we need another scale, another unit of reference, the Lifetime Carbon Equivalent — LCE
Average British consumption 65 years ≈ 1 LCE
British Prime Minister, 6 months ≈ 1 LCE
Parliamentary Estate, 1 Month ≈ 1 LCE
Fighter Jet, 48 hours ≈ 1 LCE
1 GW coal station, 46 minutes ≈ 1 LCE
BP oil and gas, 40.6 seconds ≈ 1 LCE
