Even as residents of the national capital contend with a poor air quality index the bursting of crackers on Diwali will escalate health hazards over the next few days experts say. Despite issuing warnings every year no strict action is being taken from the health perspective. There is awareness among people against bursting crackers but it will still happen. So post-Diwali for 2-3 days there is a chance of an increase in patients with breathing or other problems Dr Neeraj Jain of the chest medicine department at Sir Ganga Ram Hospital told IANS. What fuels a firecracker is generally charcoal.