sky pebble, mega city

thiis is a city from the future, when sea levels have risen and land is at a premium its sits above the sea and its supporting structures houses the equivilant of a small town each of people. There are three support structures. the one at the front houses just the recycle staff and there famillies.there are no landfills or incinerators here everything is recycled. what is seperated and not of use is shipped elsewhere where for use. the other two supporting structures house the working classees and some civil servants. each pillar has hole at the bootom which pulls air from just above sea level. the colum also pulls up sea water which is treated and supplies the sky pebble population with water. the pebble itself is 100% solar and being closer to the sun can power more than 3x its own capaicty, and sells excess engergy..... This city its 100% renewable energy. in the megga city lives professionals and the middle and upper classes. the piramids at top are for agreculture farming, wildlife and recreation use.