LPG-powered tricycles safe?

DOE sounds alarm on LPG-powered tricycles
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"The Department of Energy (DOE) on Tuesday raised its concern on the safety of liquefied petroleum gas (LPG)-converted tricycles amid reports of exploding tanks and the health risks involved in using cooking gas to power vehicles. During its meeting with members of the industry, DOE officials urged manufacturers installing LPG kits on tricycles to ensure that they follow safety standards. The warning came after the energy department received reports that some tricycle operators in the provinces attached LPG tanks on the rooftop of their sidecars..."
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Actually, LPG is non-toxic, non-corrosive, and lead-free. It is also cheaper per liter by almost 50% than ordinary gasoline.
It has already been in use in other countries as a cheaper alternative for gasoline-fed vehicles.
If installed properly, it could even be safer than gasoline. Check out this report.

Now with respect to LPG tanks attached to the rooftop of sidecars...hmm that's pretty ingenious. However...
Pray that it doesn't slip off and land on your head.
When that happens, you might as well been hit by a truck.
From above.