What is urban recycling ?

A. renovating inner-city buildings for occupation by the middle classes
B. a new domestic waste reduction strategy for inner-city areas
C. councils buying up cheap housing to turn into commercial developments
D. refurbishing old buildings and finding new uses for previously used land

Which of these is not a reason why the rate of urban growth is larger in developing countries ?

A. living in closely connected settlements is a social feature common in developing countries
B. fertility rates are generally higher in developing countries including among city dwellers
C. greater job opportunities encourage large-scale internal migration from rural areas to cities
D. reverse migration (from cities back to rural communities) can be harder in developing societies once a livelihood in a rural community is lost