How could she possibly be expected to understand his meaning? She didn't have a context for his words, and it didn't make sense to her. Lucy was stubborn, but that didn't mean her feelings wouldn't get hurt. Of course, she'd have to feel anything besides annoyance at this guy for him to really hurt her.
"Well, I've got no firsthand basis for comparison, but this city is my city, and I want to do my part." Because she didn't know what he was talking about, his words didn't really sink in. She didn't know where he was from. All she could tell was that he wasn't from around here -- from his claims and from his accent.
Her eyes narrowed again. "Perfect. Hmmph." Sure, things were warm and fuzzy compared to the things that he might have seen, but she wasn't aware. her life was far from perfect, in her eyes. Lucy was proud to be an environmentalist, thank you very much. "I'm Lucy," she said, starting after him again. Well, not really following him, but traveling in the same direction still, see? "Are you always such a glittering ray of sunshine, or did I just catch you on a bad day?"