(1) The towers and tanks belonged to a plant for converting liquefied petroleum gas into propane and other products.

(2) One way to do just this would be to detect the on-going production of hydrocarbons such as propane which cannot be produced by volcanic activity.

(3) From natural gas and propane to heating oil and gasoline, prices are on the rise.

(4) The gas component may be ethane, propane , butane, carbon dioxide, or hydrogen sulphide, but is most commonly methane.

(5) There is no water, no electricity, no kerosene, no propane , no benzine, no security.