Meanwhile, the Canberra Liberals will move a motion on Tuesday afternoon in an effort to compel the ACT Greens to criticise their federal counterparts.

The ACT Legislative Assembly will sit over a marathon two-week session from Tuesday in order to debate and pass the territory's 2021-22 budget, which was tabled in October.

This will be the last two sitting weeks of the year. There will be a two-month long break, with the first sitting of 2022 not expected until the second week of February.

The opposition and Greens will both put forward motions on Tuesday afternoon.

Greens crossbencher Jo Clay will put forward a motion on Tuesday afternoon that will call on the government introduce legislation to require people to use animal-friendly netting to protect their produce.

Ms Clay will ask for the laws to be introduced by 2023.

"The ACT Greens value animals as sentient beings who deserve to be free from direct and indirect harm. We want animals to be able to enjoy their lives, and to remove any obstacles that threaten their safety," she said.

"People use netting over their backyard fruit trees to protect their produce but unfortunately, netting that has too wide a gauge traps grey-headed flying foxes, possums, snakes, birds and other precious wildlife.

"When animals are injured by netting, it takes a long time for them to recover and causes them much distress and pain. Many won't survive the experience."

But the opposition will also attempt to put the Greens under the microscope.

The opposition spokesman on veterans' affairs, Jeremy Hanson, will call on leaders of the Legislative Assembly's three parties to write to the federal Greens to express their concern of the federal Green's election commitment to reduce the national defence budget to 1 per cent of gross domestic product.

This would make more than $300 billion available over the next decade.

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Mr Hanson said the cuts would be devastating for the territory's economy.

"The ACT is home to the Australian Defence Force headquarters, approximately 8000 direct ADF staff and a further 7000 defence personnel in the APS," he said.

"The economic contribution of the defence industry to the ACT and surrounding region is $4.3 billion GSP and around 25,000 defence jobs."

The motion will largely be used a political point for the opposition. The federal Greens have virtually no chance of forming government in their own right at the next election but there is a chance the party could hold the balance of power.

Federal Greens leader Adam Bandt told The Canberra Times in May that he hoped the "success story" of the ACT's power-sharing agreement could be done at a federal level.

It also comes after the opposition supported a motion two weeks ago that required the Canberra Liberals to write to Prime Minister Scott Morrison about setting more ambitious targets for emissions reduction.

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