Countries including Mauritius and Cuba reiterate life-or-death nature of cutting emissions, calling it ‘a moral duty’

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

Jamaica has led calls from vulnerable nations at the Cop30 climate summit to urge immediate action on climate breakdown as the conference entered its second week.

As high-level ministers from governments around the world took over negotiations in Belém, Brazil, vulnerable nations lined up to say how important it was that wealthier countries cut emissions in order to limit the worst effects of global heating. In addition, they renewed a longstanding call for rich nations to do more financially to help poor countries deal with warming.

Marina Silva says contentious plan would be ‘ethical answer’ to climate crisis but does not commit Brazil to it

Brazil’s environment minister, Marina Silva, has urged all countries to have the courage to address the need for a fossil fuel phaseout, calling the drawing up of a roadmap for it an “ethical” response to the climate crisis.

She emphasised, however, that the process would be voluntary for those governments that wished to participate, and “self-determined”.

With temperatures breaching the Paris limit, experts say tackling the powerful gas could buy crucial time as the clean-energy shift stalls

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

For two years, global temperatures have exceeded the 1.5C heating limit laid out in the Paris climate agreement. This overshooting will have “devastating consequences”, the UN secretary general, António Guterres, has warned.

The biggest worry for scientists is that further heating could trigger irreversible tipping points, such as the widespread drying out and dying off of the Amazon, or the melting of the Greenland ice sheet, beyond which climate breakdown could spiral out of control.

Munduruku people demand to speak to Brazil’s president, saying they are never listened to

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

Protesters blockaded the main entrance to the Cop30 climate conference for several hours early on Friday morning, demanding to speak to Brazil’s president about the plight of the country’s Indigenous peoples.

About 50 people from the Munduruku people in the Amazon basin blocked the entrance with some assistance from international green groups, watched by a huge phalanx of riot police, soldiers and military vehicles.

Investigation by Guardian and Carbon Brief finds just a fifth of funds to fight global heating went to poorest 44 countries

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

China and wealthy petrostates including Saudi Arabia and UAE are among countries receiving large sums of climate finance, according to an analysis.

The Guardian and Carbon Brief analysed previously unreported submissions to the UN, along with data from the Organisation for Economic Cooperation and Development (OECD), that show how billions of dollars of public money is being committed to the fight against global heating.

In this week’s newsletter: Critics have yet come up with an alternative that would truly bring all countries together to work to solve the climate crisis

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World leaders – or at least about 50 of them – flew away from preliminary Cop meetings in the Amazonian city of Belém last week, where they met to discuss the climate crisis, the ravages committed on the planet’s biggest rainforest only too apparent beneath them, if they chose to look.

Deforestation, drought and the climate crisis are pushing the Amazon to what could become a “tipping point”, where it changes state from a rainforest to a savannah ecosystem, and from a massive absorber of carbon to releasing carbon into the atmosphere, which would have devastating consequences for the whole world.

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