 Complete the following phrase:  Between June 2019 and February 2020, various Australian states and territories were subject to large numbers of uncontrolled bushfires, mainly in the southeast of the country. , fires burnt an estimated , destroyed over 5,900 buildings including 2,779 homes and killed at least 34 people. An estimated one billion animals were killed and some endangered species may be driven to extinction. Air quality dropped to hazardous levels. The cost of dealing with the bushfires is expected to exceed the 4.4 billion of the 