Normalized survival function fits for PAH clouds in different environments. The dashed black block curve represents the fit for all the clouds, and the other block curves are for all clouds in a specific environment, as labeled (i.e., bar in purple, spiral arm in light blue, interarm in green, and disk in yellow). The dashed curves, color-coded by sSFR, are the fits to the galaxy-by-galaxy per environment (depending on the block curves).