Featured interview: Philanthropist Howard Buffett

While Moscow is threatening to terminate the crucial Black Sea grain export deal if the G7 bans exports to Russia, the G7 itself wants to see the deal extended and expanded. Business executive and major philanthropist Howard Buffett knows full well the consequences of failure. He's just returned from his seventh trip to Ukraine since Russia's invasion and promised to double his humanitarian support for the country. He joins Julia to discuss. 

Also on today's show: Sumant Sinha, founder and CEO of Renew, one of India's leading clean energy companies. 

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