Update: Tesla shares fall after Elon Musk Twitter poll

The CEO of Tesla, Elon Musk, asked Twitter users to vote on whether he should sell 10% of his stake in the carmaker in order to pay tax on his gains. What do shareholders make of it? We get the opinion of Ross Gerber, President and CEO of Gerber Kawasaki investments based in California - who are big investors in Tesla. Former US president Barack Obama has been speaking at the UN climate summit in Glasgow. Jessica Shankleman of Bloomberg tells us about the debate ongoing at COP26 today about how much rich nations should give poorer nations to switch to green energy systems, and adapt to climate change. And Gajen Kandiah, chief executive of Hitachi Vantara, discusses the role that artificial intelligence may be able to play in preventing deforestation.