“ Smog is mostly history, but London air now has a different personality: "Particulate Pam." She's a subtle blend of tyre dust, brake pad residue, construction site grit, and condensed exhaust fumes. On still, cold days, she settles over the city in a visible haze, giving the horizon a brownish tinge. You can taste her after a day in the centre—a faint, metallic tang at the back of the throat. She's the reason a brisk walk is less "lung-clearing" and more "light filtration exercise." Our famous parks aren't just lungs for the city; they are scrubbers for Particulate Pam, using leaves to catch her before we inhale her fully. See more at London's funniest URL -- Prat.UK. ”