Speaking to PTI on Friday, Nivit Kumar Yadav, programme director at CSE’s sustainable industrialisation unit, said the analysis shows that the root of the region’s pollution problem was not just the winter spike but also the lack of data-driven action taken during the summer months. “Until regulatory bodies are strengthened with the capacity to compile, understand, and make data-driven decisions and plan accordingly, the massive monitoring network remains practically useless,” he added.