temperature inversion
Delhi's Winter Crisis: Understanding the Temperature-Pollution Relationship in November-December
Dec 05, 2025 10:44 pm CST
Delhi faces its annual winter pollution crisis as temperatures plummet to 5°C, trapping pollutants and pushing AQI readings above 300. Data analysis reveals a clear inverse relationship between falling temperatures and worsening air quality, with pollution levels peaking when temperatures drop below 20°C. As December progresses, the cold, stagnant air continues to lock pollutants in place, creating hazardous conditions that have sparked protests across the capital.
Indian Cities Record Decade of Unsafe Air Quality Levels Despite National Clean Air Programme
Nov 28, 2025 11:08 pm CST
A comprehensive ten-year analysis reveals that no major Indian city has achieved safe air quality levels since 2015, with even Bengaluru consistently exceeding safe thresholds. Delhi remains the most polluted metropolis despite various interventions, while local pollution sources now outweigh seasonal factors across urban India, creating serious health risks for millions of outdoor workers.
Delhi's Air Quality Crisis: Green Crackers Fail as City Records Worst Post-Diwali Pollution in Five Years Despite Reduced Stubble Burning
Oct 21, 2025 11:08 pm CST
Delhi experienced its worst post-Diwali air pollution in five years despite a 77.5% reduction in stubble burning, with PM2.5 levels reaching 488 micrograms per cubic meter—100 times the WHO recommended limit. The catastrophic 212% increase from pre-Diwali levels highlights that even "green" firecrackers failed to prevent the toxic smog, confirming that local emissions remain the primary pollution source in the capital region. Experts warn this recurring health crisis demands immediate policy action beyond seasonal restrictions.