Thanks for the response, I feel had some fun time made up the...

Thanks for the response, I feel had some fun time made up the story at Sunday afternoon.

The reason I set the timeline of the smart wall 20 years later is the AI or any devices called smart in recent days are very inmature yet, I feel at least 20years work needed to get some decent smart thing like Cornata today in the video games.

As for the wall against bushfire thing, I am absolutely not expert, not even seen one before. But from many YouTube videos I feel if there are something of 8 meters high and 100 meters long can defeat the heat will definitely help firefighters to take care the other side of the fire, if we can quickly build that wall anywhere we need of cause. I have to admit I am too optimistic of the capability of H02 here