UN Climate Change Executive Secretary Simon Stiell has said all populations and all economies need to get results from the COP30 climate talks, but added time is running out.
He was speaking as the climate negotiations in Belém, Brazil, have reached the halfway mark.
Mr Stiell hinted at impasses over critical issues such as providing climate finance and transitioning away from fossil fuels, and urged the negotiators to push further to find compromises.
With government ministers, including Ireland's Minister for Climate Daragh O'Brien, arriving in Belém before Monday, the focus is about to shift from technical drafting of proposed agreements and declarations to tricky high-stakes diplomacy and decision-making.
Energy, finance, climate adaptation and climate ambition will be the key battlegrounds.
Mr Stiell has hinted strongly about log jams and stalled progress on key issues which could include climate finance, transparency, ambition, and matters that impact on international trade.
He appealed last night to the negotiators to make it as easy as possible for governments to compromise by pushing themselves further and sticking to the painstaking yet crucial work behind the scenes.
Mr Stiell said certain climate issue that are not a priority for some countries are clearly issues and priorities for others.
He added that the negotiating process must deliver strong results.
That requires listening to and understanding the issues that matter most to other nations and groups, he said.
He told the negotiators from 194 countries, plus the EU, that if they do not align and find common ground on issues important to others, then COP30 will not deliver outcomes that show the Paris Climate Agreement is working.
He asked them to seek out and find each other in hallways to iron out their difficulties.
"It is not clear if every national negotiating team is prepared to be at the table discussing the critical issues, but the negotiations need to get past this point quickly," he said.
Mr Stiell said that the prospect of a hotter, poorer and less healthy world, along with the human and economic losses caused by climate change, strongly underscores just how important it is for COP30 to achieve a good outcome.
Earlier, the Executive Secretary had appealed to the parties negotiating to make progress in relation to the provision of climate finance for poorer countries.
Mr Stiell said such assistance is the life blood of climate action.
"It is what turns climate plans into progress and climate ambition into implementation.
He reiterated that providing climate finance is not an act of charity by rich nations.
Rather, he said, it is smart economics, because climate action, underpinned by climate finance, is the growth story of the 21st century.
When climate finance is made available, ambition grows.
It enables climate plans to be implemented, which creates jobs, reduces the cost of living, improves health, protects communities, and secures a prosperous and more resilient planet for all.
Prominent Climate Scientist Katherine Hayhoe, who is the Chief Scientist at The Nature Conservancy, and speaker on behalf of Nature4Climate, a global coalition of environmental organisations, said COP30 has lived up to its promise of being an implementation cop during its first week.
She said she was pleased to hear indigenous voices at the negotiating table, and to see the role of nature take centre stage in climate solutions.
Ms Hayhoe was referring to initiatives such as the Tropical Forest Forever Facility, launched by the Brazilian COP30 Presidency in the first few days.
She described this facility as a potential game-changer for curbing deforestation.
It aims to raise €125 billion per year to reward countries for preserving rainforests like the Amazon.
The idea is to ensure a hectare of rainforest will always be worth more than a hectare of land cleared for farming.
This will ensure that any incentive to cut down the trees is removed.
Two days after it was announced, the Tropical Forest Forever Facility had attracted commitments of $5.5 billion in funding from Norway, Brazil, France, Germany, China and others. Ireland did not invest.
Taoiseach Micheál Martin described it as "interesting" and said his Government will assess it.
Week one of COP30 has seen unprecedented attention paid to climate misinformation and efforts to ensure people have accurate and factual information for responsible decisions.
However, there is no guarantee that week two will run as smoothly.
The outcome depends critically on how ministers and negotiators tackle the continued global reliance on fossil fuels.
Melissa, a Category 5 hurricane, tore through the Caribbean, severely impacting Jamaica just three days before the COP30 leaders' summit.
The Philippines was also hit by its second major typhoon in a single week.
Heat waves, floods, wildfires and droughts are becoming more severe and putting more people at risk every single year.
Ms Hayhoe said a strong outcome to the Belém climate talks would send a powerful signal of solidarity and hope to the communities on the front lines of climate change.
Every line in the draft COP30 text represents lives, livelihoods and ecosystems.
There are some very tricky issues for government ministers to deal with in week two the negotiations.
The obligation of developed countries to provide finance for poorer countries is certainly one.
Another concerns issues around trade and the potential consequences of a Carbon Border Adjustment Mechanism for international trade rules.
Such a mechanism could also significantly disadvantage already vulnerable poorer nations trying to export into bigger markets.
For them, a carbon border price adjustment imposed on their products might be akin to a tariff.
There is also the issue of transparency and building trust, within and between countries about climate measures and climate actions that we are told are being implemented.
It is one thing for a country to give certain commitments in response to international climate targets.
It is quite another for them to live up to those promises, commitment and turn them into action.
This focus on transparency issues over the coming week will shift the international climate policy focus from simply registering and recording national climate pledges to a focus on monitoring and policing the implementation of climate commitments.
This is a fundamental shift.
It is key to ensuring that COP30 is truly an implementation COP as has been promised by Brazil's President Lula.
