c24 smell

The city they were in, Waset, lay at the edge of one of the planet's many sandstone deserts. Consequently, the air smelled faintly of dust, of sandstone baking under the sun.

Well, according to her enhanced sense of smell, it was actually dust, thruster exhaust, three different types of plant pollen, nanocrete, Eva's slightly obnoxious perfume, and the odors of no less than eight different humans—female, around her age.

Dust was the most prominent, though.

(To The Stars, Chapter 24)