PURNIMA SAH   Margherita, Assam:The hustle-bustle that once defined the coal town of Margherita in Assam’s Tinsukia district is missing these days. Lorries transporting coal, and colliery employees taking tea breaks at small shops were common sights here. But with the collieries in North Eastern Coalfields (NEC) shutting down, the ‘Coal Queen’ is on the brink … Continue reading Margherita’s collieries sink into oblivion, push workers to the brink