We delivered a clear message at Cop30: the delayers and defeatists are losing the climate fight | Ed Miliband

WITHtired, maddening, sleepless. This is what it was like to be part of Cop30 in Brazil. Yet more than 190 countries came together in the Amazon rainforest and reaffirmed their belief in multilateralism, the Paris Agreement and the need redouble our efforts keep global warming to 1.5°C.

We turned to Cop because working with other countries to fight the climate crisis is the only way to protect our home and way of life. We know that the UK only produces 1% emissionsThat is why, as the Prime Minister said in Belem, our government is doing everything it can to work with others to reduce the remaining 99%.

We also know that driving the transition forward offers huge opportunities, which is why in Britain we are making historic investments in renewables and nuclear power, upgrading millions of homes and taking action to protect nature.

It is true that the UK wanted more from this cop, including details of how we will accelerate the global energy transition through an agreement that is clearly promised a road map to transition away from fossil fuels. This did not happen because some countries did not agree.

However, on this issue we have seen the emergence of an impressive coalition of 83 countries from the global north and global south, with the support of more than 140 global business and civil society groups. And Brazil will launch a roadmap to help countries transition away from fossil fuels and build up clean energy.

This teaches such an important lesson: detailed negotiations matter, but the movements we build around them have a profound impact on what can be achieved. Roadmap to achieve our goal stop and reverse deforestation by 2030 offers the same opportunity to advance our global efforts to tackle the natural and climate crises together.

There's a bigger picture here too. This year's summit was a test of whether countries will continue to work together on the greatest collective threat we face in a time of political challenge, or with the United States withdrawal from the Paris Agreementthere could be a domino effect if others leave. Despite all the challenges, the countries have chosen the path of cooperation.

So Cop30 is part of a long history of these negotiations, during which the world changed its trajectory from 4°C warming about ten years ago to 2.3-2.5°C. Despite this progress, our goal 1.5C for a reason – because the science is clear that every fraction of a degree matters in limiting the exposure people will face here and around the world. That is why it is important that the world commits itself to intensifying efforts to address this problem through Belem Mission to 1.5 and Global Implementation Accelerator.

Ambitions to reduce emissions go hand in hand with funding to make this possible, including for developing countries. Last year, countries agreed that by 2035 we will need to mobilize at least $300 billion (£230 billion) of climate finance for developing countries every year. This year, as a core part of our fight against climate change, we agreed that this funding should be used to triple support for climate resilience.

Our Brazilian hosts were determined to make this part of the implementation process – and great progress was made outside the meeting rooms. This was, of course, the first policeman in the Amazon, and the UK was proud to have worked with Brazil in the two years leading up to the summit, helping it develop the Rainforests Forever Fund, which offers incredibly inspiring solution to global deforestation.

We also worked with Brazil and many other countries on the Global Climate Action Agenda, which aims to build the coalitions spanning governments, businesses, cities and civil society needed to accelerate local action—on issues from reducing methane emissions and phasing out coal to unlocking clean energy investment.

Thousands of UK businesses have been involved in these initiatives. Our researchers, universities, mayors and others have also been active on climate issues at this COP. And the UK played a key role in achieving the final outcome of this summit, thanks to our track record of climate leadership at home and abroad, and the exceptional skills and determination of our public service.

The message coming out of Belem was clear: despite the noise, clean energy and climate action remain the bedrock on which the global economy is being rebuilt and rebuilt. We are up against the passage of time and enormous global forces that can slow or stop action. In the face of this opposition, our best hope is multilateralism. Despite all its shortcomings, the Constitutional Court confirmed the faith of the vast majority of countries in the world in this ideal. Those who deny or obstruct action do not win the argument, they lose.