The following five definitions relating to primary care should be taken together. They describe the care provided to the patient, the system of providing such care, the types of physicians whose role in the system is to provide primary care, and the role of other physicians, and non-physicians, in providing such care.
Where The U.S. Gets Its Oil. America is one of the world's largest oil producers, and close to 40 percent of U.S. oil needs are met at home. Most of the imports currently come from five countries: Canada, Saudi Arabia, Mexico, Venezuela and Nigeria.
Oil is Americaâs largest source of energy, accounting for forty percent of Americaâs energy consumption. According to Energy Information Administration data, the U.S. produces about forty percent of the oil it uses. An overwhelming proportion of U.S. crude oil is refined in one of four states: Texas (twenty-two percent), Louisiana (twenty percent), Alaska (twenty percent), and California (eighteen percent).