NPR Notícias de negócios: Gas prices have dropped $1 in a little over a month. What's driving the dip?

Gas prices have dropped $1 in a little over a month. What's driving the dip?
AAA reports the average price of gas in the United States has fallen below $4 a gallon. That's a sharp drop from an average of $5 a gallon just a little over a month ago.

leia mais em NPR