KOCHI: As the call against the industrial pollution caused by plywood factories strengthens, hundreds of people took part in a protest march to the District Collectorate on Monday.

The protest march, led by the Action Council for Environmental Protection, sought the cancellation of licences of the plywood manufacturing units in the worst polluted areas, a stop in approving licences to companies in residential areas, ban on the night-time functioning of the companies and raised various other demands. The march was inaugurated by social activist C R Neelakandan.