NEW YORK — With deadly extreme weather hitting all over the globe, rising temperatures peaking during the hottest summer on record and carbon pollution levels that keep climbing, Britain's Prince William and wealthy entrepreneurs Bill Gates and Michael Bloomberg promised a warming world a degree of hope.

That comes in the form of innovation, creativity and technology, the trio and others said at a summit Tuesday in the posh Plaza Hotel. They announced finalists for William’s third annual Earthshot Prize that offers five awards of 1 million pounds ($1.2 million) to companies and groups that come up with new ways to save the planet.

"We've got to hang onto optimism and hope because it is the biggest driver of change, the biggest driver of innovation," William told the crowd of movers and shakers.

While a healthy dose of realistic pessimism about Earth’s climate is important, the heir to the British throne said he wants people to believe "there is hope; there are people out there doing incredible things that will have massive impacts on our futures."

William's summit highlighted 15 different finalists from around the world, including efforts to reduce London air pollution from vehicle tires, reduce livestock methane emissions by new types of seaweed feedstock and use DNA technology to make more sustainable textile dyes. The British royal has made several trips around New York City since his arrival on Monday to discuss climate change with innovators and world leadership.

Prince William reveals secret Central Park jog

William took a moment to enjoy the nature in New York, revealing at the summit that he slipped away for a morning job in Central Park.

"I decided to join the hordes of New Yorkers doing their morning routine," he said in a video shared on social media. "It was wonderful waking up in New York on a sunny morning rather than the rain we had yesterday. It was beautiful getting some fresh air this morning."

Bill Gates talks tech's place in climate change

Days after protesters in the street, many of them under 30, talked of robbed futures, speakers at the Earthshot summit – named because it was inspired by President John F. Kennedy’s moonshot effort in the 1960s – saw a different world developing, mainly because of changes in technology.

"There's a lot of climate exaggeration," said Gates, who founded Microsoft and is now a philanthropist. "The climate is not the end of the planet. So the planet is going to be fine."

Gates cited a reason for thinking it won't be as bad as it once looked: Since 2015, until last year, the world went on a "gigantic" innovation binge in efforts that could help curb climate change.

Gates promoted a winner from last year who tries to use rock-like resources to safely store carbon dioxide sucked from the atmosphere, speeding up a natural process by 100,000 times. If that company can get the price of storing carbon dioxide down to $50 a ton it "brings in this additional tool that reduces the temperature rise."

Treasury secretary discusses how company investments can financially impact climate crisis

Later, at the same hotel, U.S. Treasury Secretary Janet Yellen talked about more down-to-Earth financial issues — how powerful companies could have what’s called net-zero investments, which is not funding industries and firms that emit heat-trapping gases.

"The climate crisis has propelled a massive economic shift," Yellen said.

She then introduced a series of best practices for these financial institutions to carry out their net-zero commitments called "Principles for Net-Zero Financing and Investment."

Yellen also announced that a group of philanthropic organizations – including Bezos Earth Fund, Bloomberg Philanthropies and others – would pledge $340 million to help financial institutions "develop and execute robust, voluntary net-zero commitments," she said.

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Prince William visits firehouse near 9/11 attacks

Afterward, Prince William headed toward ground zero, where he visited with firefighters at FDNY Ten House, the station that was the first on the scene at the World Trade Center after the 9/11 attacks.

He then greeted scores of people lined up behind metal barricades across the street. The prince shook outstretched hands and chatted briefly with people.

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