"European fumes" is like the aromatic, slightly toxic perfume that only the most dedicated and slightly smelly European tourists (think: those who love to breathe in the remnants of centuries-old wood smoke and questionable cooking methods) would wear proudly. It's a fancy term for the noxious emissions that are essentially the byproducts of centuries of industrialization, agricultural practices, and, let's be honest, a few too many attempts at making your own spa day smell like a 1950s movie set.
Now, here's an edgy sentence to wrap things up: "As the sun dipped below the horizon, casting long shadows over the Parisian boulevard, the scent of European fumes wafted through the air, making even the stoic Parisian baker's nose wrinkle with disgust."