Well, recent news has shown that there has been an under ground park proposed for Manhattan.What I mean by “proposing”,is that there is an abandoned subway terminal,and people are saying things like...
“ if you give it to me i will make a parking garage”,and things like that.
Now, a group of entrepreneurs are proposing an elaborate green makeover, in which sunlight would be "harvested" above ground and channeled into the vaults below via a network of fiber-optic cables -- creating an environment apparently filled with natural light and, in theory, ripe for growing all the foliage of a typical city park.
three. I also think that in the future we could be living under ground and on the surface of the earth, because we have the basic things mankind needs to survive underground: food,water,oxygen,and sunlight