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What ways we have to preserve our children from gas when they are alone at the kitchen or at home?
Of course we can tell them how dangerous is to turn switch of gas stove. And of course we can turn over a gas-crane. But is it enough?
An electronic gas switch woud turn the gas on if the "On" command was given by registered fingertips only.
This would also reduce crime as many killers murder their victims by the means of gas.