Symphony of the Soil, a multi-film project by Deborah Koons Garcia (www.symphonyofthesoil.com)

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How do soils form? What are they made of? How do they work? How can we make best use of them and will this help to avert a looming world food-production crisis? This beautifully made documentary attempts to address all these questions and certainly succeeds in providing us with a better understanding of the first three questions and of winning our sympathy for the solutions suggested for the last one.

The formation of soils over geological time is superbly illustrated by reference to a soil...

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