NEW YORK, July 20 (UPI) -- Crude oil prices closed down Friday, losing $1.22 to $91.44 a barrel on the New York Mercantile Exchange.
Gasoline gained less than a penny to settle at $2.94 a gallon.
Home heating oil lost 2 cents to end the session at $2.92 a gallon.
Natural gas posted an 8-cent gain to close at $3.08 per million British thermal units.
At the pump, the national average price of unleaded gasoline added 1 cent overnight to $3.447 per gallon, AAA said.
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BEIJING, June 18 (UPI) --The Chinese city of Shenzhen has launched the first of seven pilot emission trading schemes planned for China, the world's largest greenhouse gas emitter.
PARIS, June 18 (UPI) --A new system for indirect precision attack for land and naval forces has been unveiled at the Paris Air Show by European missile systems company MBDA.