• Overpopulation refers to issues arising from the number of human beings on the planet relative to available resources. For more links about overpopulation as it relates to cities, see Mahalo's Guide to Urban Sprawl.
  • Fast Facts:

    1. Current world population: 6.6 billion (est.)
    2. Projected world population in year 2050: 9.2 billion, according to a United Nations report