The protests have been organised by an international group calling themselves 'Extinction Rebellion', and have intended to disrupt the flow of weekday traffic in Sydney, Melbourne and Canberra in particular.

Wagga woman Leanne Schulz made the journey to Sydney to take part in the demonstration activities.

"There are a few of us that have made the trip from Wagga and Albury, some have come to Sydney, others to Canberra," Ms Schulz said.

"We've come from all over. Some have never been involved with activities for which they could be arrested, but after years of trying to be heard by our government, they're exhausted and now they're prepared to be arrested."

On Monday, the protesters staged a 'take back the streets' march, which delayed the passage of traffic through Haymarket in Sydney's CBD.

"We have a target to create 3.5 per cent mass disruption, we achieve achieved one of our objectives there, by delaying traffic for up to an hour," Ms Schulz said.

"I understand that people might not be comfortable with the idea of these sorts of protests, but without action [on climate change], what's coming is going to be a lot more uncomfortable than this."

But with thousands congregating across the major cities, and many having had to travel to be there, criticism over the potential transport hypocrisy has been floated.

Careful forethought was given to that problem, said Ms Schulz.

"It doesn't make sense for us to fly such a short distance [from Wagga to Sydney]," she said.

"We carpooled to the train station and took the train to Sydney. That made the most economic sense, to travel in one car and commute via the Sydney network."

While onboard the XPT, the group of Riverina residents also took part in another controversial aspect of the protest: 'Seed bombing'.

"It's guerrilla gardening, we threw balls of Australian native seeds into the train corridors with the idea that that will rejuvenate that land on these commutes," Ms Schulz said.

"The hope is that with the next rain, they'll begin to germinate and grow and create a biodiversity corridor."

The Sydney-based protests are due to end on Sunday, with the collective creating a 'human hourglass' on Bondi Beach.

The Extinction Rebellion movement began in London this year and has rapidly grown throughout the world. It now boasts two separate groups in Wagga and Albury.

Although vowing to keep the momentum strong upon their return to Wagga, Ms Schulz has stressed that there are no major disruptions planned for the country cities around the Riverina.

"[Extinction Rebellion] heeds the call for mass disruption in major cities, we attend as individuals and are part of the global movement," she said.

"We have no intention of being disruptive in Wagga. There we plant trees, make seed bombs, write letters, talk and host meetings to support each other.

"Our disruptions are only for the major cities and if people can get there, then great. But in Wagga, we just had about a thousand turn up to a student-led protest, so we're seeing that people are awake to it.

"Wagga is listening, watching and asking questions."