Australia has pinned its hopes on existing technologies and unproven breakthroughs to achieve a 2050 net-zero carbon emissions target.

Prime Minister Scott Morrison will take the commitment to the United Nations COP26 climate conference which starts on Sunday in Glasgow.

Australia will not update its 2030 goals despite international pressure to do more in the next decade to limit global temperature rises.

Instead, the government released new projections showing the nation would reduce its emissions 30 to 35 per cent on 2005 levels by the end of the decade.

That outstrips the existing 26 to 28 per cent commitment but remains well short of nations like the United States which has pledged a 50 to 52 per cent reduction.

Mr Morrison on Tuesday revealed the government's plan to reach 2050 carbon neutrality relies on existing policies.

With emissions having reduced 20 per cent since 2005, half the remaining 80 per cent will rest on a technology roadmap.

Ultra-low cost solar has joined clean hydrogen, energy storage, low emissions steel and aluminium, carbon capture and storage, and soil carbon on the map's priority technologies.

The government has committed to spending $20 billion on low emissions technologies by 2030.

That is expected to trigger between $60 billion and $100 billion of public-private investments over the same period.

Global technology trends are expected to account for 15 per cent of emissions reduction by 2050, while international and domestic offsets represent 10 to 20 per cent in cuts.

A further 15 per cent is expected to be achieved through technology breakthroughs.

Energy Minister Angus Taylor said methane-reducing livestock feed, low-emissions cement, more efficient solar panels and software could fall into that category.

The prime minister said there would be no legislation or mandates attached to the target.

"It will not increase energy bills. It is not a revolution but a careful evolution to take advantage of changes in our markets," he told reporters in Canberra.

The Productivity Commission will monitor the socio-economic impact of climate action on regional communities every five years from 2023.

Mr Morrison said he would "eventually" release modelling promising jobs, regions and industries will be protected.

The plan claims people will be $2000 better off on average in 2050 compared with inaction, and floats the creation of 62,000 new roles in regional mining and heavy industry.

It also suggests gross national income will be 1.6 per cent higher and electricity costs will not rise.

Opposition Leader Anthony Albanese said the plan was a scam, accusing the coalition of having net-zero modelling, net-zero legislation and net-zero unity.

"The word 'plan' doesn't constitute a plan, no matter how often you say it and what font it is printed in," he said.

Labor's climate spokesman Chris Bowen said he had seen more detail on fortune cookies.

The ALP has committed to releasing a 2050 emissions reduction plan before the election, but has not revealed if it will put a 2030 goal to voters.

UK Prime Minister Boris Johnson hailed the commitment as heroic because of Australia's reliance on coal and other emissions-heavy industries.

His government is chairing the COP26 summit, where more ambitious 2030 climate-change action is expected from many nations.

It is unclear what concessions the Nationals were handed in exchange for supporting a 2050 goal aside from Resources Minister Keith Pitt returning to cabinet.

Some Nationals backbenchers, including outspoken Queensland senator Matt Canavan, vowed to continue campaigning against the policy.

There is internal concern the coalition could bleed votes to conservative outfits including Pauline Hanson's One Nation and Clive Palmer's United Australia Party.

© AAP 2021

Macarthur FC have moved swiftly to fill the void left by captain Adam Federici's unexpected retirement, signing Filip Kurto for the upcoming A-League Men season.

Kurto joins the Bulls after previous stints at Western United and Wellington Phoenix.

The signing of the 190cm Polish goalkeeper comes just days after ex-Socceroos shot-stopper Federici announced he was hanging up his gloves with immediate effect due to injury.

That decision left Macarthur with only 21-year-old Nick Suman on their books as senior goalkeepers.

Kurto, 30, was named goalkeeper of the year after an impressive campaign with the Phoenix in 2018-19 but was released by Western United in June after an injury-marred season which included repeated bouts of concussion.

Bulls coach Ante Milicic said Kurto's experience will be a plus for his side heading into the new campaign.

"Filip will bring his invaluable European and A-League knowledge and experience to our squad," Milicic said.

"Alongside Nick Suman he will give us tremendous security in the goalkeeping department.

"He has been outstanding in his A-League journey so far and I look forward to watching what he can bring under the guidance of myself and (goalkeeping coach) Glen Moss for the upcoming season."

Macarthur open their second ALM season against the Phoenix at Campbelltown Stadium on November 21.

© AAP 2021

Australia is expected to allow quarantine-free travel for fully vaccinated international arrivals into at least four states before Christmas.

South Australia will scrap isolation requirements for overseas and domestic travellers with two coronavirus jabs when the state reaches 90 per cent immunisation coverage.

Premier Steven Marshall expects the milestone to be reached before Christmas, weeks after state borders open on November 23.

Victoria and NSW will permit double-jabbed overseas arrivals to enter Melbourne and Sydney without having to isolate from Monday.

Tasmania has set December 15 as the date it will throw open borders to international and domestic travellers.

All travellers will be required to test negative for coronavirus.

The SA government's announcement further isolates Western Australia, which is likely to remain shut to countries, states and territories with coronavirus until next year.

The massive backlog of returning Australians will be the first to benefit from the new international travel arrangements before migrant workers, international students and tourists.

Australia is on track for one of the world's highest vaccination rates, with more than 74 per cent of over-16s now fully vaccinated.

In excess of 87 per cent have received at least one dose.

The vaccine rollout - plagued by delays for months - is expected to soon include booster shots for the general public.

The Therapeutic Goods Administration and Australian Technical Advisory Group on Immunisation met with Health Minister Greg Hunt on Monday.

Mr Hunt said a decision on third jabs for the wider population was imminent.

"Over the next coming days, I expect to receive the final advice of the TGA on the booster program," he told parliament on Tuesday.

"As we go forward, we continue to save lives and protect lives."

People with severely compromised immune systems are eligible for top-up vaccines.

Aged care residents and older Australians are likely to be next to receive third shots when the booster program expands.

All states and territories have passed the 60 per cent two-dose coverage, with WA the last state to reach the mark.

Case numbers rose slightly in Victoria with 1510 new infections and four deaths reported on Tuesday.

There was a slight drop in NSW cases with 282 recorded, along with another death, while Canberra detected 12 new cases.

Queensland registered two new local cases - a teenage boy who was a close contact of a person that travelled from NSW, and a woman in home quarantine after being in Melbourne.

© AAP 2021

A suspect is in custody after two people were killed and four injured - including a police officer - in a shooting at a shopping mall in Boise, Idaho.

At a news conference, authorities said officers exchanged gunfire with the suspect. The majority of the mall has been cleared, but police were still looking for any additional victims.

Police didn't release any other information about the victims or the suspect, saying the investigation was ongoing.

Boise Police Chief Ryan Lee said the shooting was reported to law enforcement about 1.50pm on Monday - including a report that one person was "shot and down" at that time.

When the officers arrived, they spotted someone who matched the description of the suspect.

"There was an exchange of gunfire that ensued shortly thereafter, resulting in the officer's injury, as well as the suspect being taken into custody," Lee said.

Investigators believe there was only one shooter, and there is no ongoing danger to the public.

"We really cannot at this time speak to any motivation behind it," Lee said, calling any speculation premature.

"I cannot stress enough how traumatic this event is for the community at large, as well as for those that were witnesses, or are the families of those involved or involved themselves," Lee said.

After the shooting, several witnesses stood in the rain outside the entrance to Macy's - one of five large department stores at the mall - waiting to be interviewed by police or told they could leave.

Patrol cars from several agencies, ambulances and fire trucks filled a section of the mall parking lot. Officers from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives were assisting in the investigation.

Five hundred metres away, officers closed part of a road near a busy intersection so they could investigate a second crime scene related to the shooting incident. Officers at the second crime scene declined to answer questions about the investigation other than to confirm it was related to the shooting.

Investigators were working with hospital officials to notify family members of those injured and killed in the shooting, Lee said.

Boise Mayor Lauren McLean asked members of the public and the news media to give the victims and their families privacy as they deal with the trauma of the shooting.

She thanked the law enforcement officers, first responders and others she said worked to keep the community safe.

"Countless people found themselves in a situation they never would have or should have expected," McLean said, lauding the shopkeepers and others in the mall for reacting "so quickly to take care of folks that were there.

"You showed in a tough and chaotic moment how much you care and what you're willing to do to support and care for strangers."

© AP 2021