KOLKATA, 1 SEPT: At a time when the state pollution control board has taken up a drive to phase out lead, a toxic-metal, innumerable lead-battery units in the city not only continue to cough out lead aerosols dust, but also ignore the safety of labourers working in these units.

There are about 100 small or medium lead battery units operating on the stretch of APC Road from Manicktala Crossing t