Securing the Belém Action Mechanism is a top priority for climate justice advocates at the talks in Brazil

• Cop30: click here for full Guardian coverage of the climate talks in Brazil

All through the halls of the UN climate talks, civil society activists are wearing badges that read “Bam!”. They are not showing their fandom for old superhero comics but rather indicating their support for the Belém Action Mechanism (Bam), a proposal for states to drive action on a just transition towards a low-carbon economy.

Securing the Bam is a top priority for climate justice advocates at Cop30. Proponents say that if a just transition is not a priority, climate action will unintentionally leave workers and communities behind.

Minister from islands facing extinction is one of few delegates directly calling out Trump’s climate policies

Of all the representatives from 193 countries present at the crucial UN climate talks in Belém, Brazil, only one has summoned the courage to take the stage and publicly denounce the absent and hostile Trump administration: the climate minister of tiny Tuvalu.

On Monday, Maina Vakafua Talia told leaders and diplomats at the Cop30 summit that Donald Trump had shown a “shameful disregard for the rest of the world” by withdrawing the US from the Paris climate agreement.

Funeral for fossil fuels held as part of ‘Great People’s March’ calling on governments to step up climate efforts

The streets of Belém echoed with indigenous chants, classical Brazilian songs and calls for environmental justice on Saturday as tens of thousands of people marched to demand urgent action on the climate and nature crisis.

Activists from around the world converged on the Amazonian host city of COP30, urging negotiators to ramp up ambition.