slavin:
“If the world’s 6.9 billion people lived in one city, how large would that city be if it were as dense as…” smartercities: doitdoitdoitnow
“If the world’s 6.9 billion people lived in one city, how large would that city be if it were as dense as…”
smartercities:
doitdoitdoitnow
4:16 pm • 6 March 2011
