Nissan says makes breakthrough with engine in reducing CO2 emissions

(Bloomberg) — While 2020 raged, Warren Buffett mostly held his tongue.He stayed quiet through a heated presidential election, a racial reckoning that sparked nationwide protests and an exuberance for stocks thats gripped millions of Americans. Not to mention a global pandemic. Now, the billionaire chief executive officer of Berkshire Hathaway Inc. has a chance to break his silence with the release of his annual letter Saturday.If this letter doesnt address some of the issues, people are going to…

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