**Text 1** — Advocates of urban greening often claim that rooftop gardens can substantially lower city air temperatures, pointing to the natural cooling effect of vegetation. **Text 2** — Engineer Dana Ruiz measured rooftop gardens in Phoenix and found meaningful cooling only where gardens used drought-adapted plants with steady irrigation; poorly maintained plots showed negligible effects. The benefit, she concludes, is conditional rather than automatic.
Based on the texts, how would Ruiz (Text 2) most likely respond to the advocates' claim in Text 1?