[246-6] Mega Cities, 2009
More than half of the world's population lives in cities. Depending on who is counting and how the research is carried out, this critical moment in the history of humanity was reached sometime between 2004 and 2006.
[246-5] Mega Cities, 2009
More than half of the world's population lives in cities. Depending on who is counting and how the research is carried out, this critical moment in the history of humanity was reached sometime between 2004 and 2006.
[245-4] Mega Cities, 2006
More than half of the world's population lives in cities. Depending on who is counting and how the research is carried out, this critical moment in the history of humanity was reached sometime between 2004 and 2006.
