Yahoo! energy News

In addition to celebrating American independence this holiday weekend, consumers can also cheer gas prices, which will be at their lowest levels on July Fourth since 2005. At a national average of just $2.31 per gallon, gas prices this week are 47 cents less than last year, according to a new report by AAA, even after recent seasonal increases. AAA projects that nearly 43 million Americans will travel for the holiday weekend this year.

Texas-based Tesoro Corp. has bought an oil refinery in southwestern North Dakota that has struggled to turn a profit due to a dramatic fall in demand and low diesel prices. North Dakota-based MDU Resources ...