Foreign animals and plants can cause huge damage, with the march of Argentine ants in the UK a new example of how climate change is boosting the threat

Invasions by alien species and global warming form a “deadly duo”, scientists have warned, with the march of Argentine ants in the UK a new example. The public are being asked to be on alert for invaders such as the raccoon dog and Asian hornet, as eradication can be near impossible after a species becomes established.

As trade and human travel has become globalised many thousands of species have crossed oceans or mountain ranges and become established in new regions, with some causing “invasional meltdown” and over a trillion of dollars of damage a year.

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