The New York Times says climate change threatens low lying airports. The Sydney Airport is only ten feet (3m) above sea level.
According to NOAA, sea level at Sydney will rise three meters in only 6,000 years.
Sea Level Trends – NOAA Tides & Currents
Stonehenge is about 5,000 years old. They better start moving the airport now.
On the other hand, the tide gauge may be exaggerating the threat. Photographs show no change in Sydney sea level over the last 130 years.
They may actually have 10,000 years to move the airport, or well into the next ice age.