How does a cracker qualify as 'green' in India?

CSIR-NEERI tests green firecrackers in a sealed chamber in Nagpur to measure particulate matter, gaseous emissions and noise. They must emit at least 30% less particulate matter, or 20% less particulate matter alongside 10% fewer gaseous pollutants than conventional crackers. The formulations are then provided to manufacturers with PESO licences. However, green crackers are not pollution-free.