How many hectares of forest and bush land were burned in the bushfires?

大火烧毁了多少公顷的森林和丛林呢？

In fact, there's evidence that Australia's indigenous people practised regular burning of bush land for thousands of years before the arrival of the Europeans.

事实上，有证据表明，在欧洲人到达之前，澳大利亚土著已经实施了常规的灌木林燃烧长达千年。