"The lighting effects and noise levels depend on the chemistry of fireworks and the combustive features of the ingredients, the major concern being inappropriate stoichiometric amounts of the ingredients in making common firecrackers.

"Firecrackers are made of chemicals/metallic agents some of which are toxic when they burst. The major constituents of smog that forms from firecracker emissions contain sulphur oxides and nitrogen oxides and significant dust load or particulate matters that may contain any of the heavy metals including lead, mercury besides lithium and aluminium," the report said.

The court asked CPCB to upload the prescribed limit of checmical composition of commonly used firecrackers on its websites.

The board was asked by the apex court in its order on November 11 last year to study and prepare a report on the harmful effects of the materials which are currently being used in the manufacture of fireworks.

It had asked for the report within a period of three months.

The apex court had on November 11 last year directed the Centre to suspend all such licences as permit sale of fireworks, wholesale and retail within the territory of NCR and said that the suspension shall remain in force till further orders of the court.

It had also directed that no such licences shall be granted or renewed till further orders.

(This article has not been edited by DNA's editorial team and is auto-generated from an agency feed.)