Extinction Rebellion's (XR) Spring Rebellion kicked off in Sydney with an occupation of the busy intersection in front of Central Station on October 7.
Murawari and Budjiti man and Water For Rivers activist Uncle Bruce Shillingsworth said: "We're here to fight to the end."
The action was the start of XR's Week of Rebellion, during which protests demanding action on the climate emergency are being coordinated across the world.
According to XR, the aim of the internationally coordinated Spring Rebellion week of action is to "peacefully occupy the centres of power and shut them down." XR is demanding governments "Tell the truth about our climate and ecological emergency" and "act now".