501derful.org
Mega cities–more that 10 million residents–are rapidly appearing in many parts of the world, and the population of citizens in cities is expected to pass populations is rural areas for the first time in 2007.
Mega cities–more that 10 million residents–are rapidly appearing in many parts of the world, and the population of citizens in cities is expected to pass populations is rural areas for the first time in 2007.
