Mumbai, Oct. 15 -- The dairy department, which manages Aarey Milk Colony, has permitted the Mumbai Metropolitan Region Development Authority (MMRDA) to begin construction work for the 32-storey Metro Bhavan, which is likely to require the felling of at least 70 trees on the allotted plot. While environmentalists have alleged this plot is in an eco-sensitive zone (ESZ), Aarey authorities say "the natural ecology outside the allotted plot" will not be affected by the construction....