Climate activists are using shareholder meetings to turn up the heat on corporations about their carbon footprints, from flooding them with questions to more colourful tactics like singing or throwing cake at executives. Last week's Volkswagen shareholders meeting was particularly testy, with a cake landing on the podium where supervisory board member Wolfgang Porsche, who was celebrating his 80th birthday, was sitting. Scientist Rebellion activists held up a sign slamming the emissions from the group's vehicles. Another person took her top off in protest at the company's operations in China's Xinjiang region, where rights groups and the US say genocide...