Ask AP: Global warming and the Earth's rotation

That's one of the mysteries solved in this edition of "Ask AP," a weekly Q&A column where AP journalists respond to readers' questions about the news.

If you have your own news-related question that you'd like to see answered by an AP reporter or editor, send it to newsquestions@ap.org, with "Ask AP" in the subject line. And please include your full name and hometown so they can be published with your question.

___

What oil companies, if any, do not import oil? I would buy from them alone if I knew who they were.

Sue Copeland

Kilgore, Texas

___

You'd be hard-pressed to find an oil company involved in refining that doesn't import oil.

The bottom line is they don't produce enough oil on their own to run their refineries and produce gasoline, diesel and other products. According to the Energy Information Administration, which keeps energy statistics for the federal government, less than 40 percent of the crude oil used by U.S. refineries was produced in the United States.