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Our ability to develop sustainably depends on biodiversity: the variety and variability of genes, species, populations, and ecosystems to support our planet’s essential goods and services. Biodiversity provides resources, such as food, fiber, and fuel, ecosystem services, such as renewal of soil fertility and purification of water, and spiritual and aesthetic benefits on which human societies depend. Unfortunately, invasion by plants, animals, and pathogens into non-native environments pose one of the most significant, but least addressed, threats to biodiversity.