Us Nitrogen In Greene County Has Reported An Unusual Emission From Its Nitric Acid Plant During Startup This Weekend. The Company Says Workers Immediately Shut Down The Facility Yesterday When They Noticed A More Prominent Discharge Than Normal From The Exhaust Stack. Parent Company Austin Powder Says No One Was Harmed And There Was No Environmental Damage. Local And Government Authorities Were Notified While Investigators Look For The Cause Of The Malfunction.