<i></i><i>- applying technology to building denser housing. for example, imagine cheap robotic excavation, so every house and building could bury all their parking lots and long term storage areas below ground instead of occupying valuable real estate.</i><i></i><p>You need to watch this: Digging down is for the 1% it would seem.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=sLJ0zZQb9x0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=sLJ0zZQb9x0</a>