This is very cool. We've reported many times on the destruction caused by leaking gas pipes, particularly in urban centers. Now a possible fix comes along at least in detecting leaks.
The major financial problem, though, is this: It is cheaper, in most places, for the utility company to pay fines than fix the leak. It is great to be more nimble on locating them. But, who fixes them and how quickly?
No doubt this is a major health risk. It is literally under our noses. Yes, it can be re mediated. But, like our sagging infrastructure, by whose money and will? Perhaps residents will now rise up and demand an end to allowing noxious gas to seep into their homes and businesses.