Jeff Bezos has revealed plans to give away most of his $124bn (£110bn) fortune in his lifetime.
The 58-year-old Amazon founder is the second richest man in the world after Elon Musk, the head of Tesla and new owner of Twitter, according to Forbes.
This is the first time he has said he plans to give most of his money away.
Bezos has been criticized in the past for not signing the Giving Pledge, a campaign founded by Warren Buffett and Bill Gates to encourage the mega-rich to give most of their wealth to charity.
Asked directly by CNN if he planned to donate most of his money, Bezos said, “Yes, I do.”
Bezos told the US broadcaster that he and his girlfriend, journalist-turned-philanthropist Lauren Sanchez, were “building the capacity to be able to give that money away”.
He said the money would go to causes that work to tackle climate change and to support people who can unify humanity.
A week ago it was announced at the start of the COP27 summit that his Bezos Earth Fund had pledged a further $1 billion by 2030 to help protect carbon stocks and biodiversity, based on 9,000 millions of dollars of funds already committed to the climate cause.
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Also last week it was revealed that country music star Dolly Parton had received a $100m (£85m) prize from Mr. Bezos.
The Courage and Civility Award gives people the opportunity to donate cash to causes of their choice.
Parton, a longtime philanthropist, has already established several charities and committed $1 million to the development of a COVID vaccine during the pandemic.
Bezos has more time on his hands to pursue his passions after stepping down as CEO of Amazon last year.
It continues to own about 10% of the e-commerce streaming giant.
His other business interests include ownership of the Washington Post and space tourism company Blue Origin.