Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UN Warns of Hazardous Waste Threat After Beirut Blast Lisa Schlein GENEVA - '¯The U.N. Development Program warns the explosion at the Port of Beirut has unleashed tons of hazardous waste that pose enormous threats to health and the environment if not disposed of properly. The prognosis is not good. U.N. officials say the situation preceding the blast that turned parts of Lebanon's capital city into rubble was already dismal. They say huge quantities of construction and demolition waste were generated when the 2,750 tons of ammonium nitrate stored at the port exploded nearly one month ago. .