Trading Aliens:
How Politics Helps and Hinders Invasive Species

The spread of non-native species across the globe is a major concern – species out of their natural range can cause millions of pounds of damage, spread diseases to humans and livestock and threaten native wildlife. They are a huge financial burden to control, but almost impossible to eradicate. New invasive species reach foreign lands by hitching a ride on our trade routes, so changes to global trade could have serious implications for our economies and our ecosystems.
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