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ACACIA MEARNSII
Hawaii introduced black wattle as a forestry tree; it escaped cultivation and now chokes about 3,000 acres of Maui pasture, gulches, and empty lotsBlack wattle has become a formidable invasive force in Hawaii, spreading rapidly beyond its initial planting zones into the island's treasu...- South Africa, in the mid-1800s, planted millions of Australian acacias as a dune fix; 180 years later, that decision is costing the country its rivers and ecosystemA 19th-century solution to coastal erosion in South Africa, planting Australian Acacia trees, has become a major environmental crisis. Thes...
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