Why in news?

A revised action plan was created to fight the pollution in New Delhi and the National Capital Region

What is the new plan to tackle pollution?  

• On October 6th, the first stage of revised Graded Response Action Plan (GRAP) was implemented
• Under this, the Commission for Air Quality Management (CAQM) will ask authorities in Delhi-NCR to enforce restrictions on polluting activities depending on the Air Quality Index, or AQI

These restrictions are divided into four stages

• Stage 1 for “poor” Air Quality Index (AQI) ranging between 201 and 300,
• Stage 2 for “very poor” AQI of 301-400,
• Stage 3 for “severe” AQI of 401-450
• Stage 4 for “severe plus” AQI more than 450