Crackers versus vehicles: What really contributes to Delhi's Diwali pollution?

Delhi's Diwali pollution is influenced by both firecrackers and vehicles, which have varying impacts. Vehicle emissions contribute significantly to the city's daily PM2.5 pollution throughout the year. Fireworks, while contributing to pollution during the festive season, spike levels of harmful particles rapidly. The combination of these emissions complicates air quality situations during Diwali,