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“We still have a chance to make greenhouse gas emissions tumble, with a new generation of national climate plans. But we need these stronger plans, now,” Stiell said in a speech at the Chatham House think tank in London. He suggested that climate action is not just for powerful people to address — in a not-so-veiled reference to the electoral calendar this year.

“Who exactly has two years to save the world? The answer is every person on this planet,” Stiell said. “More and more people want climate action right across societies and political spectrums, in large part because they are feeling the impacts of the climate crisis in their everyday lives and their household budgets.”

Crop-destroying droughts have increased the need for bolder action to curb emissions and help farmers adapt which could boost food security and lessen hunger, he said. “Cutting fossil fuel pollution will mean better health and huge savings for governments and households alike,” Stiell said.

Not everyone is convinced such warnings will be helpful.

"‘Two years to save the world’ is meaningless rhetoric — at best, it’s likely to be ignored, at worst, it will be counterproductive,” said Princeton University climate scientist Michael Oppenheimer, who is also a professor of international affairs.

Levels of carbon dioxide and methane in the air last year , according to United States government calculations, while scientists calculate that . Last year was the global temperature monitoring groups concluded.

If emissions of carbon dioxide and methane from continue to rise or don't start a sharp decline, Stiell said it “will further entrench the gross inequalities between the world’s richest and poorest countries and communities" that are being worsened by climate change.

And behind it all is money.

Stiell's speech comes just ahead of meetings of The World Bank and other big multinational development institutions, where poorer nations, led by Barbados Prime Minister Mia Mottley and Kenyan President William Ruto, are to poor nations, especially those hit by climate-related disasters.

In conjunction with that push, Stiell called for “a quantum leap this year in climate finance.” He called for debt relief for the countries that need it the most, saying they are spending $400 billion on debt financing instead of preparing for and preventing future climate change.

He called for more financial aid, not just loans, and more money from different groups like banks, the International Maritime Organization, and the G20, the world's 20 most powerful economies. Those countries are responsible for 80% of the world's heat-trapping emissions, he said.

“G20 leadership must be at the core of the solution, as it was during the great financial crisis,” Stiell said.

"Every day, finance ministers, CEOs, investors, and development bankers direct trillions of dollars. It’s time to shift those dollars from the energy and infrastructure of the past, towards that of a cleaner, more resilient future," Stiell said. “And to ensure that the poorest and most vulnerable countries benefit.”

Officials said the climate finance problem needs to be fixed by the end of the year with November's climate negotiations in Baku, Azerbaijan, a crucial point.

Stiell is “absolutely right” that timing and finance are the heart of the matter, said longtime climate analyst Alden Meyer of European think tank E3G. The carbon action plans submitted by next year will “determine whether we can get on the trajectory of sharp emissions reductions needed to avoid much worse climate impacts than those we are already suffering today,” he said.

With so many elections and places where democracies on the brink, “climate finance related to carbon policy is on the line,” said Nancy Lindborg, president of the David and Lucille Packard Foundation, at the Skoll World Forum, an ideas conference in Oxford, England.

Climate Analytics CEO Bill Hare said Stiell was “listening to the science” — namely that global emissions must be halved by the end of the decade to meet the Paris climate accord's ambition of capping global temperature increases to 1.5 degrees Celsius (2.7 Fahrenheit).

“Governments are nowhere near that, and disastrously many are still supporting new fossil fuel development,” Hare said. “We need to see a massive strengthening of action now - faster ramping up of renewables, electric vehicles and batteries - if we’re to get serious reductions by 2030. The longer we wait, the more it will cost.”

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Keaten contributed from Geneva.

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