Petroleum is useful because it gives you, in terms of energy, the most bang for your buck. It can be harmful to the environment, but careful regulation dispels some of its effects.
it is a jelly type substance
Great Britain
What is an offsetwell??
They are made from rubber, and petroleum.
Great Britain
natural oil, gypsum, and petroluem
for natural gas and oil that comes from the sea
ice firebird \
Petroleum is a major source of energy in the world.
By the use of his analytical skills
Lpg [lutrified petroluem gas ]
There are 6.289811 barrels (petroluem) in 1 m3.