ACT politicians have renewed their calls for the federal government to join a United Nations treaty banning the use of nuclear weapons, which came into force on Friday.
Politicians and members of the international diplomatic corps gathered on Saturday at the Canberra Rotary peace bell in Nara Peace Park to mark the entry-into-force of the treaty.
Greens member for Ginninderra Jo Clay said Australia's continued relationship with uranium mining and the creation of nuclear weapons was unacceptable.
"With climate change upon us, the ACT Greens believe that there has never been a more urgent time for Australia to join its 86 international counterparts and show its commitment to a more peaceful and sustainable future for all of us," Ms Clay said in a statement.
All Greens members of the Legislative Assembly have signed the International Campaign to Abolish Nuclear Weapons' parliamentary pledge.
Some Labor members, including Chief Minister Andrew Barr and Deputy Chief Minister Yvette Berry, have signed the pledge. Federal member for Canberra Alicia Payne has also signed.
The Australian government has not signed the treaty, which compels signatories to stop developing, testing, producing or stockpiling nuclear weapons. Signatories are also banned from threatening to use the weapons.
Fifty countries ratified the treaty in October, which was condemned by the United States.
Red Cross International humanitarian law adviser Tara Gutman welcomed the treaty, saying the law was the cornerstone of a world free of nuclear weapons.
"There has been no humanitarian response developed that is remotely capable of being applied to a nuclear weapon attack. We simply will not be there to assist victims," she said.
"These weapons are an inhumane response to any military threat ... They decimate populations, cause untold and needless suffering, and their environmental impact would accelerate climate change making some areas of the planet uninhabitable.
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