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 the largest source of energy in the United States, providing close to 40 percent of all of the nation's entire power needs. Though most oil is used for transportation or home heating purposes, a small percentage is still used as a fuel for electricity generating plants.