Most countries in the world have little capacity to deal effectively with invasive species, a study suggests.
The spread of non-native species threatens livelihoods and biodiversity, but the issue is worsened by global trade, travel and climate change.
Writing in Nature Communications journal, an international team forecast how the spread of species could change over the 21st Century.
They show that one-sixth of the world's land surface is vulnerable to invasion.
BBC: Most nations lack ability to deal with invasive species
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