Protesters have chained themselves to machinery and buildings, blocked intersections with coffins and clashed with police in a series of rallies across Australia which have caused peak-hour chaos.
At the top of Melbourne's West Gate Bridge during Friday-morning rush-hour, a 17-year-old activist climbed a six-metre tripod until arrested by police.
Events have also been held in Perth and Adelaide, and while rain deterred similar action in NSW and Queensland during the past week, more protests are planned for Sydney and Brisbane next week.
So what's it all about?
After months of inaction throughout the height of the COVID-19 pandemic, Extinction Rebellion protesters this week tried to reassert their presence.
Thousands of climate activists clogged cities for an 'autumn rebellion'.
Just as Australia has navigated the pandemic by following scientific advice, authorities should do the same for climate change, Extinction Rebellion SA spokesperson Ben Brooker told AAP.
"The relatively small amount of disruption Extinction Rebellion causes is nothing compared to what climate change not only will do, but is already doing," he said.
The group is calling for the federal government to set a target for net zero emissions by 2025.
"The federal government hasn't even signed on to net zero by 2050, as many countries have," Mr Brooker said.
"We actually think 2050 is much too late."
Energy and Emissions Reduction Minister Angus Taylor criticised the group's tactics of "intimidation".
"All Australians have the right to protest peacefully, but the track record of groups like Extinction Rebellion is disgraceful," a spokesperson for Mr Taylor told AAP.
"Australians have been appalled by what they have seen from these extremists."
The spokesperson said Australia is supporting global emissions reduction with a "technology-led plan".
"There is no solution -- there is no net zero -- unless all countries play a role," they added, citing collaborations with the UK, US, Japan and South Korea.
Those foreign partners are pushing to set targets of net zero emissions by 2050.
At Wednesday's disco-themed rally in Adelaide, Trish Hammond told AAP she wanted to secure a future for her "four beautiful grandkids".
Wearing pink glasses and a "dancing for our lives" sign fastened to flared silk pants, the 74-year-old said she "cries on the inside every day about the climate crisis".
Passerby Franscisca Simone watched on as the activists danced through the streets.
"They are protesting for the climate, which is nice," she said, before glancing at banked-up motorists honking their horns.
"But then again, I'm not stuck in my car getting angry."
In Melbourne hundreds of police were deployed to monitor activists, who gathered at various locations including a 'mass die-in' at News Corp's Victorian headquarters on Thursday.
Dozens of activists were arrested in Perth across the week, where protests included a funeral march on Wednesday in which streets were blocked with coffins.