A disused petrol pump can be seen behind a boab tree in the Queensland town of Mungallala, located on the Warrego Highway in Australia, August 14, 2017. Picture taken August 14, 2017. REUTERS/David Gray

The handle of a disused petrol pump can be seen out the front of an old petrol station in the western New South Wales town of Mudgee in Australia, August 17, 2017. Picture taken August 17, 2017. REUTERS/David Gray

An 'out of order' petrol pump can be seen in front of beer advertisements at the Edgeroi Fuel Shop located on the Newell Highway in the town of Edgeroi in north-western New South Wales, Australia, August 15, 2017. Picture taken August 15, 2017. REUTERS/David Gray

A flock of Australian native birds called Galahs fly behind petrol pumps at sunrise in the south-western Queensland town of Stonehenge in Australia, August 13, 2017. Picture taken August 13, 2017. REUTERS/David Gray

A disused petrol pump can be seen behind a boab tree in the Queensland town of Mungallala, located on the Warrego Highway in Australia, August 14, 2017. Picture taken August 14, 2017. REUTERS/David Gray

A disused petrol pump can be seen outside the Cooladdi Post Office and motel, located in the town of Cooladdi in south-western Queensland, Australia, August 14, 2017. Picture taken August 14, 2017. REUTERS/David Gray

A disused petrol pump can be seen behind a boab tree in the Queensland town of Mungallala, located on the Warrego Highway in Australia, August 14, 2017. Picture taken August 14, 2017. REUTERS/David Gray

Newspaper posters are displayed behind a petrol pump at the general store in the town of Bilpin, located on the Bells Line of Road in the region known as the Blue Mountains, west of Sydney in Australia, August 17, 2017. Picture taken August 17, 2017. REUTERS/David Gray

Disused petrol pumps can be seen out the front of an old petrol station in the western New South Wales town of Mudgee in Australia, August 17, 2017. Picture taken August 17, 2017. REUTERS/David Gray

An Australia Post letterbox can be seen next to an old petrol pump at the general store in the town of Bilpin, located on the Bells Line of Road in the region known as the Blue Mountains, west of Sydney in Australia, August 17, 2017. Picture taken August 17, 2017. REUTERS/David Gray

Old petrol pumps can be seen outside an old house along the Black Stump Way road in the north-western New South Wales town of Tambar Springs in Australia, August 16, 2017. Picture taken August 16, 2017. REUTERS/David Gray

A disused petrol pump can be seen outside the Cooladdi Post Office and motel, located in the town of Cooladdi in south-western Queensland, Australia, August 14, 2017. Picture taken August 14, 2017. REUTERS/David Gray

An old petrol pump can be seen on the Bells Line of Road near the township of Bilpin in the region known as the Blue Mountains, west of Sydney in Australia, August 17, 2017. Picture taken August 17, 2017. REUTERS/David Gray

An old petrol pump can be seen outside a mechanic's shed in the north-western New South Wales town of Bourke in Australia, August 9, 2017. Picture taken August 9, 2017. REUTERS/David Gray