By Roger Harrabin
BBC environment analyst
More than 40 world leaders say they will work together to turbo-charge the uptake of clean technologies by imposing worldwide standards and policies.
The announcement will be made at the climate summit COP26 in Glasgow on Tuesday.
Five high-carbon sectors will be targeted at first, including agriculture and electricity.
It aims to encourage global private investment in low-carbon technologies.
Similar international attempts have been made previously to push clean tech – but nothing as ambitious as this multi-lateral agreement.
Its backers want to reassure investors that global markets will be created for green technology and that it is a good financial bet.
It is hoped that eventually the initiative will help draw in trillions of dollars in private finance for cutting emissions.
The five sectors that the plan will cover at first are steel, road transport, agriculture, hydrogen, and electricity.
The initiative, known as the Glasgow Breakthroughs, was applauded by Nick Mabey from the climate think tank e3g.
He told me: "This potentially has real muscle. It takes climate change out of the negotiating halls and into the real economy.
"Imagine if major nations agreed to set a target for the amount of 'green steel' to be made. (That's steel made with hydrogen or electricity.) That would be really powerful by creating a market."
Read more about the COP26 summit here.
The plan has been launched by the UK Prime Minister Boris Johnson, alongside representatives from the USA, India, EU, and – importantly – China.
The signatories are said to represent more than 70% of the world's economy and every region.
A similar approach has been running in the EU where law-makers have steadily increased efficiency standards on electrical goods so they run creating fewer emissions.
Crucially, firms wanting to export into the EU must reach the same standards – it's proved that higher standards in one part of the world can influence technology in another. It's hoped this process could be embraced and greatly expanded with the "Glasgow Breakthroughs".
This video can not be played
UK Prime Minister Boris Johnson said: "By making clean technology the most affordable, accessible and attractive choice, the default go-to in what are currently the most polluting sectors, we can cut emissions right around the world.
"The Glasgow Breakthroughs will turbocharge this forward, so that by 2030 clean technologies can be enjoyed everywhere, not only reducing emissions but also creating more jobs and greater prosperity."
Leaders have committed to discussing progress every year in each sector, starting in 2022. This work will be supported by annual reports, led by the rich nations' think tank, the International Energy Agency.
At the event today, world leaders, CEOs and philanthropists are also expected to launch:
The government's climate advisers will welcome clean technology initiatives – but they say the PM can't ignore the need for behaviour change, too – such as walking and cycling more and eating less meat and dairy.
Follow Roger on Twitter.
Bezos pledges $2bn for restoring nature
US to tackle methane leaks from oil and gas wells
Australian man charged over Cleo Smith abduction
The four-year-old was found in a locked home 18 days after disappearing while on holiday with family.
'My name is Cleo': First words from rescued girl. Video
COP26 promises could limit global warming to 1.8C
What is the HPV vaccine?
Greeks fear megafires could be new normal for Med
India celebrates Diwali under shadow of Covid-19
How to end Ethiopia's suffering after a year of war
Why are disabled people so affected by climate change?
Sharks are my best friends. Video
When cheering a cricket win can land you in jail
'Fans know more about Schitt's Creek than I do'
BBC Travel: LA's large-scale 'Tour de Taco'
Have you been getting these songs wrong?
What happens to your body in extreme heat?
© 2021 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
By Roger Harrabin