Oxy engages in oil and gas exploration and production through its subsidiaries in three core regions of the world: the United States, Middle East/North Africa and Latin America. Oxy's Midstream, Marketing and Other segment gathers, treats, processes, transports, stores, purchases and markets crude oil (including NGLs and condensate), natural gas, carbon dioxide (CO₂) and power. It also trades around its assets, including pipelines and storage capacity, and trades commodities and securities. OxyChem, a wholly owned subsidiary, is a leading North American manufacturer of polyvinyl chloride (PVC) resins, chlorine and caustic soda – key building blocks for a variety of indispensable products such as plastics, pharmaceuticals and water treatment chemicals.