One of my hobby horses is imported seeds , particularly from China. People buy them off eBay or similar. There is absolutely no control, nothing is checked. Seeds grow into alien weeds, which could become rampant thugs like Himalayan balsam or Japanese knotweed or that one that clogs up rivers. All of which were introduced deliberately. Not to mention diseases and viruses - because I don't know the names of them.
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Not to mention diseases and viruses - because I don't know the names of them.