Cemex SAB de CV was founded in 1906. The Company is engaged in the production, marketing, distribution and sale of cement, ready-mix concrete, aggregates and other construction materials. It manufactures cement through a closely controlled chemical process, which begins with the mining and crushing of limestone and clay, and, in some instances, other raw materials. It owns the registered trademarks for its brands in Mexico, such as Tolteca, Monterrey, Maya, Anahuac, Campana, Gallo, Centenario, Impercem and Tolteca Extra, Monterrey Extra, Maya Extra, Anáhuac Extra, Campana Extra, Gallo Extra, and Centenario Extra. The Company's competitors include Lafarge Tarmac, Heidelberg, Aggregate Industries, Hope Construction Materials, Dyckerhoff, Holcim, Schwenk Lafarge, Italcementi and Vicat. The Company's operations are subject to laws and regulations relating to the protection of the environment in the various jurisdictions in which it operates, such as regulations regarding the release of cement dust into the air or emissions of greenhouse gases.