Federal regulations strictly prohibit the transport of hazardous materials such as flammable, explosive, corrosive, or environmentally harmful substances. These items pose significant risks, including potential explosions under specific conditions. It is essential to responsibly dispose of them before a cross-country move. Options include recycling or utilizing hazardous-waste collection sites. Alternatively, consider giving these items to friends or family. For guidance on proper disposal methods, consult municipal or county officials as necessary.