It can be used on heavy soils to improve drainage, but coal ash actually contains very little plant food, just small amounts of sulphur.

Coal ash contains very little plant food (perhaps small amounts of sulphur).

By 300 years the material would have the same radioactivity as coal ash.

Areas along the banks of the creek are covered in coal ash, coal silt, sand, and gravel.

Coal ash contaminants are also linked to respiratory diseases and other health and developmental problems, and have disrupted local aquatic life.