Former Federal Reserve Chair and former U.S. Treasury Secretary Janet Yellen warned on Friday that U.S. President Donald Trump's universal tariff measures are unsettling financial markets, consumers, and businesses, radically raising the risk of a U.S. economic recession.Imposing tariffs on major trading partners would have highly adverse consequences for U.S. consumers and businesses, she remarked. The U.S. heavily relies on China for critical minerals needed for clean energy technologies and batteries, and high tariffs on China could hinder the development of these industries.Related NewsUS Takes Initiative to Reach Out to CN for Tariff Talks, Says CCTV's Media Arm