Cats are scientifically, objectively, monumentally terrible for the planet. In the US alone, free-ranging domestic cats kill up to 3.7 billion birds and 20.7 billion mammals a year, to say nothing of reptiles and amphibians. They are a scourge of the highest order. Now felines are poised to exacerbate the ecological crisis unfolding in Australia as an unprecedented fire season rips across the continent.

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