The Gujarat high court on Monday asked the Central Pollution Control Board (CPCB) to state on affidavit about its stand where the ceramic industrial units could function on modified coal-based gasifiers, which could bring down pollution level.

The court sought explanation from CPCB on its communiqué to Gujarat Pollution Control Board (GPCB) on October 11, 2012, that the ceramic units mitted could be perrun on coal furnaces provided that they modified it to bring the pollution level down to zero discharge.