Delhi's Smog Cycle: Relief Fleeting, Winter Woes Return

Delhi is confronting the familiar challenge of hazardous air pollution as the brief window of improved air quality, due to a delayed winter smog onset, has closed. This year, late monsoon rains and sustained winds pushed back the usual early-October smog, but the respite is now over, and the capital is preparing for worsening conditions.

The Graded Response Action Plan (GRAP), a set of emergency measures activated during critical pollution spikes, is currently in its initial phase. However, data indicates that GRAP is a reactive, not proactive, tool. Delhi has spent a significant portion of recent winters under Stage II or higher GRAP levels, indicating a continuous need for restrictions.

Analysis shows that even stricter GRAP stages often fail to reverse pollution spikes, with air quality frequently remaining high or increasing post-implementation. Experts stress that while GRAP is crucial for immediate response, it cannot substitute for proactive, year-round emission control measures. Addressing PM2.5 and precursor gases at their source across the National Capital Region airshed is vital.

Furthermore, effective implementation of GRAP measures, including vehicular bans and border restrictions, faces challenges due to inconsistent enforcement. Environmentalists also highlight the necessity of strengthening public transport systems as a systemic alternative to private vehicles. Tackling non-vehicular sources like industrial emissions, construction dust, and waste burning is also critical for comprehensive air quality improvement.