US Edition The Prime Minister will call for an international "green new deal" to boost the environmental sector and help lift the global economy out of recession.
Mr Brown is launching the Government's industrial strategy to capitalise on the burgeoning low carbon economy at the summit in London attended by ministers and business leaders.
He will release independent research which, the Government says, shows a total of 1.3 million people will be employed in the environmental sector by 2017 - representing an annual growth rate of 5 per cent.
In his address to the summit, Mr Brown will point to the fact a growing number of countries are already including "green" measures in their fiscal stimulus packages to stave off recession.
He will say that at his talks this week with US President Barack Obama in Washington, they agreed on the "imperative" of investing in the new "green" technologies as a way of creating jobs and growth.
"We know that the more we are able to co-ordinate these measures internationally, the more confidence and certainty we will build and the more investment we will be able to bring forward," he will say.
"That's why I want to create a global 'green new deal' that will pave the way for a low carbon recovery and to help us build tomorrow's green economy today."
Energy Secretary Ed Miliband, who is also addressing the summit together with Business Secretary Lord Mandelson, said that tackling climate change did not just make moral sense, but economic sense too.
"The shift to low carbon in the UK and around the world is now largely inevitable. What is not inevitable is that Britain benefits industrially from the transition. We want to mobilise every bit of expertise and ingenuity that Britain has to offer," he said.
"Moving to a low carbon economy is the way to secure the economic recovery and growth we need at home and take a lead internationally to protect the future of the planet."
Unions and pressure groups, however, warned the Government needed to do more to promote renewable energy, as the UK was lagging behind the rest of Europe.
The Renewable Energy Association called for immediate expenditure of £625 million in "green stimulus money".
Director-general Philip Wolfe, who will attend the summit, said: "It is vital for the UK to stage a sustainable economic recovery and our investment package is an essential first step towards that."
Nathan Argent, of Greenpeace, said: "Mandelson has talked of industrial activism and now is the time to show it in practice. If this Government wants to create tens of thousands of British jobs and tackle fuel poverty, energy security and climate change in the fastest and most cost-effective way possible then they should invest in renewables and a serious energy efficiency programme
"With the best renewable energy resources and the worst housing stock in Europe, there is no better time to turn the recession crisis into an opportunity."
TUC deputy general secretary Frances O'Grady said: "Even without recession we would need decisive action to drive down carbon emissions. Preventing climate chaos can give added purpose to Government action to tackle the downturn. Moving to a low carbon economy provides an opportunity to create jobs across the country from high-tech industry to public services."