What looks like a pile of mining waste can be the opposite of living soil. Slate processing leaves behind huge quantities of fine, powdery material with little organic matter and limited ability to support vegetation.

What looks like a pile of mining waste can be the opposite of living soil. Slate processing leaves behind huge quantities of fine, powdery material with little organic matter and…

Researchers in north-west Spain are turning grape waste into a soil-like material by mixing grape marc compost and vermicompost with barren slate mining waste, potentially helping…