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PosterPoster

NOVA: Season 4

4x20 The Green Machine
TV-PG

  • 1978-01-12T02:00:00Z on PBS
  • 55 mins
  • United States
  • English
  • Documentary

Botany is a neglected science and plants are all around us, but unfamiliar. NOVA examines our state of knowledge of how plants work: growth hormones, responses to light and shade, photosynthesis, root mechanisms and twining responses.

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