Assertion: propane gas | /r/ObjectUse | used in location
Facets:
Source sentences:
text: In some locations where public utility electricity or kerosene are not readily accessible or desirable, propane gas mantle lamps are still used, although the increased availability of alternative energy sources, such as solar panels and small scale wind generators, combined with increasing efficiency of lighting products, such as compact fluorescent lamps and LEDs are also in use.