Delhi pollution: GRAP Stage IV in national capital | Explained

As Delhi battles dangerously high levels of air pollution, the Supreme Court has questioned the state government over the delay in implementing Stage 4 of the Graded Response Action Plan (GRAP). The court emphasized that Stage 4 measures should remain in force even if the Air Quality Index (AQI) drops below 450 in Delhi-NCR. In this video, we explain what is GRAP and why has it been imposed in Delhi?