The world is heating up, and there are lots of organisms frozen in tundra and ice that haven’t been part of our environment for thousands of years, long enough that we have no resistance to them if they turn out to be harmful.
Look at what happened with COVID-19, and MERS and SARS and Zika before that. Now imagine something really novel. And it doesn’t even have to be something that attacks humans directly, if it’s a rust or mould that likes the look of our food crops, it could collapse our supply chain and we’d starve.
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