EIA Canadian Crude Oil Imports: Increasing Importance to the United States U.S. consumers are sometimes surprised to learn that our single largest foreign source of crude oil is Canada, which surpassed Saudi Arabia as the leading supplier to the United States in 2004 and has continued to hold that position. Since 1990, total U.S....
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The EPA maintains State Resource Locators and contact information for several topics: Air Quality – Ambient








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