Fecha de lanzamiento

01 Jan, 1963

Tiempo de ejecución

00:10: (HH:MM)

Sinopsis

Uses animation and live action photography to describe good food chains, almost all depending ultimately on green plants, and relates these food chains to the larger concepts of the oxygen-carbon dioxide and the nitrogen cycles, and to the unending pattern of life, growth, and decay which is known as the food cycle.

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