US gas prices fall below $4 for 1st time since March, but still 25% higher than last year

U.S. gas prices fell below $4 per gallon for the first time since March, averaging $3.999, following a U.S.-Iran agreement to dilute Iran’s enriched uranium and waive sanctions. Prices remain 25% higher than last year, with regional disparities like California at $5.64 and South Carolina at $3.58, while oil prices dropped to $80 per barrel amid ongoing supply chain disruptions.