Every-air.
Everywhen.
The air is never empty. It is thick with what we cannot see—whispers of combustion, dust from distant lands, fragments of things that once were whole. You breathe in, and the world enters you. Some of it will stay.
The larger ones— particulate matter at around 10 micrometres, PM₁₀, coarse and blunt—are the easiest to notice. A breath of roadside dust, a gust of pollen, a swirl of ash from a fire long since tamed. These particles land at the body’s thresholds: the nose, the throat, the bronchi that branch like river deltas. The body is wise to them. It builds defences—mucus, coughs, sneezes: the wet guardians of the respiratory tract. You might feel them in a roughness at the back of your throat, a heaviness in your chest after a day spent in windblown fields. They can be expelled, mostly, carried away on the tide of breath.
But the finer ones slip through. Particulate matter under 2.5 micrometres in diameter – PM₂.₅—are too small to be caught, too light to settle. These are the particles of woodsmoke, of diesel exhaust, of the slow, invisible unravelling of cities and industries. They weave into the alveoli, the delicate air sacs where breath becomes blood, where oxygen dissolves into the rivers of your body. These particles do not stay at the threshold. They pass through, crossing into the bloodstream, riding the currents that lead to the heart, the brain, the places we do not think of as holding breath. They can spark inflammation, tighten the pathways of breath, whisper their presence in aching heads and lungs. They are not expelled so easily.
And then there are the ultrafines. PM₀.₁—so small they move like ghosts, slipping past every defence. The air of burning plastic, of brake pads worn down to nothing, of industry’s final, silent remnants. They do not settle. They pass through barriers that are meant to keep the body safe. Through the lungs, into the blood, and farther still—crossing into the brain, the nerves, the womb. They move through us unnoticed, until they become something other.
We speak of air as if it is only breath, but it is also memory. It carries what has been burned, what has been broken, what has been left to drift. It enters us as inheritance, and we do not choose what it brings.
Breathe in. The body takes what it must. Breathe out. Not everything leaves.
We are in the air.
Every-air.
Everywhen. The air is always moving. It shifts in unseen currents, folds itself into pockets of warmth and cold, rises and falls with the turning of the earth. It carries ash, and dust, and salt from the sea. It carries the breath of those who lived before us. And now, we ask it to carry more. Summers grow longer, heat pressing harder into the soil. The forests dry at their roots, the rivers shrink to shallow ribbons, and the air, always moving, begins to fill with the weight of what has burned before. Smoke before the fire—it lingers, held in memory, tucked into the atmosphere, ready to return. Storms gather over distant oceans, thicker now, stronger, their winds reaching further. They lift dust from places where the rain no longer falls, carry it across continents, let it settle into lungs that have never known the taste of another country’s earth. The cities choke first, but even in the valleys, even in the quietest corners, the air does not stay clean. The body does not know how to prepare. It only breathes, as it always has, drawing in whatever the wind has brought. A child gasps on a summer’s day too thick with heat and particles unseen. A grandmother finds her breath shorter with each season. The air does not belong to one place. What rises in the north will fall in the south. What burns in one summer will return in the next. The air carries it all. And the body takes it in. We are in the air.