• Elon Musk has pledged a $6 billion donation to the UN World Food Programme (WFP).
• He has asked the World Food Programme to demonstrate how $6 billion will help to eradicate world hunger.
• Musk is prepared to donate $6 billion by selling his Tesla shares.

Elon Musk's net worth has surpassed $300 billion, and he appears to be ready to spend.

The Tesla and SpaceX CEO, whose net worth has increased by more than $140 billion this year as a result of the skyrocketing value of his electric automaker, said on Twitter on Sunday that he was willing to consider a proposal from a United Nations official who suggested that a $6 billion donation from one of the world's wealthiest people could help end world hunger.

Last week, David Beasley, the director of the United Nations' World Food Programme, said it was time for the ultra-rich to "step up now, on a one-time basis" to help 42 million people who "would physically die if we don't reach them." Musk and Amazon CEO Jeff Bezos, the two richest persons on the planet, were specifically named.

Musk responded to a Twitter user who pointed out that $6 billion is only 2% of his net wealth on Sunday. Musk said he would "sell Tesla shares right now and do it" if the WFP could outline "specifically" how the gift would end world hunger.

Musk went on to say that the UN's proposal must include "open source accounting, so the public can see exactly how the money is spent" in a follow-up tweet.

Musk received a response from Beasley a few hours later, claiming that he would "be on the next flight to you" and that the CEO may "kick me out if you don't like what you hear."

Beasley also stated that the $6 billion number "WILL PREVENT global political instability, mass migration, and save 42 million people on the verge of starvation," but that it "WILL NOT END WORLD HUNGER."

Musk responded by requesting that he make the organization's current and proposed spending plans public. Musk wrote, "Sunlight is a good thing."

Musk also shared a link to a 2015 Express piece alleging that UN forces sexually abused children in the Central African Republic in 2014, along with the comment "What happened here?" in a second tweet.

A Tesla spokesperson did not immediately react to a request for comment from CNBC Make It.

It would be the largest known philanthropic contribution made by Musk if he sold $6 billion worth of Tesla shares to make a donation.

Musk has been chastised in the past for not donating more of his vast riches, however he has stated that he wants to stay anonymous when donating money and earlier this year asked Twitter users for "critical feedback" on ways he can help.

Musk pledged to give away $150 million earlier this year, including a $100 million prize in a carbon-reduction competition.