King Charles will warn world leaders ‘the Earth does not belong to us’ and call for nations to work together to battle climate change in his speech at the Cop28 summit in Dubai today

The King will tell world leaders that 'the hopes of the world rest on the decisions you must make' when he addresses the Cop28 eco-summit in Dubai today.

He is the only foreign head of state invited to speak at the climate action meeting of world leaders, celebrating his decades of environmental work.

In his speech, His Majesty is expected to tell delegates: 'I pray with all my heart that Cop28 will be a crucial turning point towards real transformational action.'

But he will also warn that while progress has been made towards a more sustainable future, repeated warning signs of the impact of climate change – especially in vulnerable regions of the Commonwealth – are being ignored.

The king believes this could have devastating consequences as “lives and livelihoods are destroyed.”

King Charles talks to representatives at the Commonwealth and Nature reception during COP28

Aides said His Majesty “deeply appreciates” the invitation, which came from the UAE as host country and at the request of the British government.

It is clear that he will argue that the world needs real action, and that solutions will only come if countries work together to make it easier for the public sector, private sector, philanthropic organizations and other stakeholders to jointly take the necessary steps to put.

“The earth is not ours, we belong to the earth,” he will add. It will be the king's first major speech on the environment since he became monarch last year, and his words came with the “full support” of the government, aides stressed.

Unlike the King, who is a staunch environmentalist, Prime Minister Rishi Sunak is backtracking on his green promises. Mr Sunak will attend along with the new Foreign Secretary, David Cameron, who spent time with the King yesterday.

Aides said His Majesty “deeply appreciates” the invitation, which came from the UAE as host country and at the request of the British government.

The king told Lord Cameron: 'I wouldn't have missed it for the world' as he met students at a campus in Dubai.

Later, he received a handmade decorated wooden bird as a gift from indigenous tribes in Brazil, a symbol of biodiversity. Joenia Wapichana said: 'I thanked him for everything he has done to help protect biodiversity in the Amazon.'

But when it comes to news that could leave green campaigners red-faced, Cop28 is probably the biggest and most polluting event of its kind, according to official figures.

The amount of greenhouse gases emitted by the event will exceed previous gatherings due to the large number of attendees, experts said.

More than 104,000 official delegates will attend the summit – and an estimated 400,000 more will attend related events in the United Arab Emirates.

The vast majority of visitors to the oil and gas-rich Gulf country will arrive by plane – so the amount of emissions produced is likely to be smaller than in previous years.

Scientists calculate that a commercial return flight to Dubai from Britain will generate around 1.3 tonnes of CO2 – and a private jet more than nine times as much per passenger.

King Charles is greeted by Foreign Secretary Lord Cameron as he arrives to meet students at the Heriot-Watt University Dubai Campus during Cop28

In his speech, His Majesty is expected to tell delegates: 'I pray with all my heart that Cop28 will be a crucial turning point towards real transformational action'

People walk through the venue for the COP28 UN Climate Summit with the Al Wasl Dome in the background in Expo City

However, climate experts say the huge amounts of greenhouse gases generated by the event will be worth it if it helps slow global warming by pushing countries to reduce their emissions.

Richard Black from the Energy and Climate Intelligence Unit said: 'Given the number of people expected here, this is likely to have the highest carbon footprint of any COP to date.

'But the size of that footprint is absolutely insignificant compared to the emission reductions that a deal can deliver. If all the agreements made at the Glasgow summit two years ago were realised, it would save 70,000 times more carbon than the summit itself produced.

'And in this regard, the biggest element of a deal on the table – the agreement to triple renewable energy deployment by 2030 – would prevent 7 billion tonnes of CO2 emissions this decade, equivalent to around 20 years of UK emissions.'

A Cop28 spokesperson said: 'Cop28 will demonstrate its sustainability ambition by hosting a carbon-conscious and sustainable event.'