Produced by Zero Population Growth and Southern Illinois University, this revised edition of the classic 1972 film presents the best-ever graphic simulation of human population growth! As the years roll by on a digital clock, dots appear on a world map to represent millions of people added to the population. Historical references are incorporated to explain large-scale fluctuations in population. A striking depiction of population growth from 1 a.d. to the present, and projection of future growth through the year 2020. Students and teachers should be aware of population trends and the pressures that increasing numbers will bring to bear on our environment. Color, DVD, six and one-half minutes, grades 6-12.