These range from simple, but efficient, propane or liquid petroleum gas (LPG), to solar cookers.

FORBES: Cooking with Julia Roberts

Allow early payment of Winter Fuel Allowance to pensioners whose homes are not connected to the mains grid, and instead use oil, liquid petroleum gas or propane gas for heating.

BBC: Bill-by-bill: Guide to MPs' private members' bills

The bill would allow for the early payment of the winter fuel allowance to people whose homes are not connected to the mains gas grid and whose principal source of fuel is home fuel oil, liquid petroleum gas or propane gas.

BBC: Winter Fuel Allowance Payments Bill

In Yerevan, Armenia, where I was last May, I noticed buses and lorries resplendent with rusty-looking cylinders of gas as their fuel supply, which is more cheaply obtained than liquid fuels, but I emphasise that it is petroleum gas (mainly propane and butane) that is used there and not biogas.

FORBES: U.K. Joins Europe On Biogas 'Waste Into Energy' Strategy