Tesla CEO, the SpaceX founder and one of the world’s richest men, Elon Musk, said he would sell his Tesla stock and spend $6 billion to "solve world hunger," but first, the United Nations' World Food Programme would have to prove exactly how that money would help the cause.

Musk posted tweets on Sunday announcing his intentions, writing, “If WFP can describe on this Twitter thread exactly how $6B will solve world hunger, I will sell Tesla stock right now and do it...But it must be open-source accounting, so the public sees precisely how the money is spent.”

Musk's comments came after WFP Chief David Beasley called on billionaires last month to share some of their wealth to end world hunger. WFP raised $8.4 billion in 2020 during a global pandemic, raising questions about how the program could not solve the crisis itself.

Beasley, when questioned on Twitter, clarified, “$6B will not solve world hunger, but it WILL prevent geopolitical instability, mass migration, and save 42 million people on the brink of starvation.” He also assured Musk that WFP has “systems in place for transparency and open-source accounting," adding, "Your team can review and work with us to be totally confident of such.”

The WFP chief even offered to sit down with Musk to talk and said he can “throw” him out if Musk did not like what he heard.

According to the Forbes World's Billionaires List, Musk sits in the No. 2 spot at an estimated $151 billion net worth. The Bloomberg Billionaires Index has Musk listed in the top spot.