Delhi tightens curbs amid ‘severe’ to ‘very poor’ air quality, ordering 50 per cent office attendance as the city tracks an Ethiopian volcanic ash cloud and its impact on AQI​Delhi tightens curbs amid ‘severe’ to ‘very poor’ air quality, ordering 50 per cent office attendance as the city tracks an Ethiopian volcanic ash cloud and its impact on AQI ​Latest News [ SOBAN NEWS: International and National ]