Chevron Corporation is a multinational energy corporation headquartered in San Ramon, California, United States. It is one of the world's largest oil and gas companies, involved in every aspect of the energy industry, including exploration, production, refining, distribution, and marketing. The company also engages in the production of petrochemicals, geothermal energy, and alternative energy sources. It operates in more than 180 countries and is one of the major players in the global energy sector. It has exploration and production activities in various regions, including the United States, Africa, Asia, Australia, and Latin America. In the upstream sector, Chevron explores and produces oil and natural gas. In the downstream sector, the company refines, markets, and distributes fuels and other energy products. It is involved in initiatives related to environmental conservation, climate change mitigation, and the development of renewable and clean energy technologies. The company invests in research and development projects focused on sustainable energy solutions.