OPINION | Mapping alien trees to protect our forests

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Pine trees, which are invasive, in the Tokai Forest, Cape Town.  (Tiyese Jeranji)
Pine trees, which are invasive, in the Tokai Forest, Cape Town. (Tiyese Jeranji)

Invasive alien trees, which cost the SA economy billions every year, cause a huge amount of damage, and have been described as "fire lighters", "enemies of biodiversity" and "water guzzlers", writes Alanna Rebelo and Nicholas Coertze.

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