Australia’s deadly bushfires estimated to have killed 1.25 billion animals and burned over 20 million acres of area in the country, according to an international environmental group.

“Around 1.25 billion animals may have been killed directly or indirectly from fires that have burnt 8.4 million hectares [over 20 million acres] across Australia, equivalent to the whole of country of Austria,” World Wildlife Fund (WWF) Australia said in a statement on Tuesday.

Calculating the figures by using methodology that estimates the effects of land clearing on wildlife in Australia, Dermot O’Gorman, chief executive officer of WWF Australia, said that loss

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