A sad experience

Finding my uncle's son-in-law (and his kid) dead as a result of gas leakage in their house, I had a sad experience (during my trip to Iran) of how my field of study could be helpful in a real world.
Today, you can hardly find a Japanese house without tens of gas sensors in it. Some for smokes and gas leakage, some for air quality control, etc.
The devices, small and relatively cheap, can save many lives specially in those countries with low safety standards. Many people are really unaware of the dangers around them and many do not care. But I think it is a duty of the authorities to give them enough information and force them to care about their own safety anyway...