Harsco Corporation is a provider of environmental solutions for industrial and specialty waste streams, and equipment and technology for the rail sector. The Company operates through three segments: Harsco Environmental, Harsco Clean Earth, and Harsco Rail. The Harsco Environmental segment operates primarily under long-term contracts, providing critical environmental services and material processing to the global steel and metals industries, including zero waste solutions for manufacturing byproducts within the metals industry. The Harsco Clean Earth segment provides waste management services including transportation, specialty waste processing, recycling and beneficial reuse solutions for hazardous waste, contaminated materials and dredged volumes. The Harsco Rail segment is a provider of engineered maintenance equipment, after-market parts and safety and diagnostic systems which support railroad and transit customers worldwide.