Centre has taken a call to invoke all actions as envisaged under Stage-IV of the Graded Response Action Plan (GRAP) – ‘Severe+’ Air Quality (Delhi’s AQI > 450), with immediate effect in the entire national capital region (NCR). Commission for Air Quality Management in NCR and adjoining areas invoked the eight-point action plan as per Stage-IV of the GRAP in the entire NCR with immediate effect to prevent further deterioration of air quality in the region, a statement issued by the Ministry of Environment, Forest and Climate Change, said. The steps include the government taking appropriate decisions on permitting work from home for employees in Central government offices. State governments may also consider additional emergency measures like the closure of colleges/ educational institutions and closure of non-emergency commercial activities, permitting running of vehicles on the odd-even basis of registration number, it said.