Extinction Rebellion activists began gathering in cities across Australia and New Zealand on Monday to kick off a fortnight of global civil disobedience demanding governments take urgent action on climate change.
Protesters held a silent meditation vigil on the steps of state parliament in Melbourne early Monday ahead of a march through the southern Australian city.
Meanwhile demonstrators shut down part of Wellington, New Zealand's capital, by chaining themselves to a bright pink car.
They were the start of planned disruptions in 60 cities around the world over the next two weeks by Extinction Rebellion, which is warning of a looming environmental "apocalypse".
Thousands are expected to join events this week in Australia, including a bee die-off enactment, a nude parade and a funeral procession for the planet.
"We have tried petitions, lobbying and marches, and now time is running out," Australian activist Jane Morton said.
"We have no choice but to rebel until our government declares a climate and ecological emergency and takes the action that is required to save us."
Australia is ruled by a conservative government that has resisted taking comprehensive action to tackle climate change, while backing lucrative coal exports.
Prime Minister Scott Morrison last month snubbed a United Nations climate summit after he was not invited to speak for lack of new climate announcements.
Extinction Rebellion's tactics in Australia have prompted senior conservative politicians to call for protesters' welfare payments to be cut and for public denunciations.
"People should take these names and the photos of these people and distribute them as far and wide as they can so that we shame these people," Australian Home Affairs Miniser Peter Dutton said on radio last week, referring to the Extinction Rebellion protesters.
"Shame them because of the actions they have committed and because they're acting outside of the law and against community standards. Let their families know what you think of their behaviour."
In the northern Australian state of Queensland, home to huge coal mines and Dutton's electorate, harsher penalties are being considered in response to their regular disruption of peak-hour traffic.
- 'Burn capitalism, not petrol' -
Extinction Rebellion has scheduled non-violent protests chiefly in Europe, North America and Australia over the next fortnight.
Events will also be held in India, Buenos Aires and Cape Town.
An "opening ceremony" Sunday evening attracted hundreds of people to central London, where plans are in place to shut down key sites including Westminster and Lambeth bridges, in addition to protests outside key government departments.
Hundreds of activists barricaded themselves inside a Paris shopping centre for hours over the weekend, unfurling banners with slogans such as: "Burn capitalism, not petrol" above restaurants and fashion boutiques.
In Delhi, one of the world's most polluted cities, dozens of protesters staged another preliminary event on Sunday by holing a "die-in" on a road in the heart of India's capital.
Holding up hands covered in red paint and signs such as "There is no planet B", they called on the Indian government to act to tackle climate change.
"I don't know if I will have a future or not," Vansha Jain, 17, told AFP.
"I want to know I have a future. Because I have dreams, I am ambitious. I want to be things, I want to do things."
Extinction Rebellion was established last year in Britain by academics and has become one of the world's fastest-growing environmental movements.
Campaigners want governments to declare a climate and ecological emergency, reduce greenhouse gas emissions to zero by 2025, halt biodiversity loss and be led by new "citizens' assemblies on climate and ecological justice.