The economy of Trinidad and Tobago relies mainly on its off-shore oil resources. Trinidad possesses sizable oil and gas reserves, and its prosperity is linked directly to the production of petroleum and petrochemicals. Agriculture employs a smaller proportion of the population than industry and services. The chief industries in Trinidad and Tobago are its petroleum, chemicals, food processing, cement, beverage brewing and its cotton textiles. The most important exports are petroleum and petroleum products, natural gas, chemicals, steel products, and fertilizer. The tourism industry is a major player too, contributing to both exposure and revenue.