GREENSBORO -- It's been a stinky week for some Greensboro residents. First, Cone Mills was dredging sludge Monday from a wastewater pond at its White Oak plant on Summit Avenue, stirring up a foul odor. And as that smell drifted away Tuesday, another wafted up on the opposite side of town, near the tank farm along Interstate 40 close to the interchange with Wendover Avenue. It's a stench that has emergency management officials puzzled. Beginning early Wednesday, residents began complaining of strong smells described as either chlorine, paint solvent or fuel. The smell was strong enough to seep into buildings...