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A program meant to improve air quality by reducing diesel emissions was included in the annual defense authorization bill the Senate passed July 23.

After six consecutive weeks of increases, the national retail price of diesel fuel fell by five-tenths of a cent to $2.433 a gallon from $2.438 the previous week.

The nationwide average price of diesel fuel was nearly flat the past week, according to U.S. Energy Information Administration data released July 13.

The national average retail price of diesel rose for the fifth consecutive week, up seven-tenths of a cent to $2.437 a gallon.

The national average retail price of diesel rose for the fourth consecutive week, half a cent to $2.43 a gallon, the Energy Information Administration reported June 29.

The national average retail price of diesel rose for the third consecutive week, 2.2 cents to $2.425 a gallon, according to data the Energy Information Administration released June 22.

The national average price of diesel has increased seven-tenths of a cent to $2.403, according to the Energy Information Administration.

The nationwide average price of a gallon of diesel increased by 1 cent to $2.396, according to the weekly report from the Energy Information Administration on June 8.

The nationwide average price of a gallon of diesel fell 0.4 cents to $2.386, erasing the same increase from a week earlier, according to the Energy Information Administration.

The nationwide average price of diesel fuel increased by about half a penny, the U.S. Energy Information Administration reported May 26, ending a streak of 19 consecutive weekly price decreases.