ABHIJEEET CHATTERJEE Durgapur, July 26: Deadlines for pollution-control measures in Bengal are meant to be elastic. The time limit for sponge iron factories to plant trees in their areas has been extended from the end of the July 14-21 forest week to the end of monsoon (first week of October). The leeway came after the 60-odd units in the state told the pollution control board they wouldn