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.