Climate activists planned to block traffic in 10 cities across Germany on Saturday as part of their campaign demanding stronger action by the government to tackle the threat posed by Earth’s warming. Last Generation, one of the most prominent climate groups in Germany, said its blockades, or what it calls “disobedient gatherings,” would begin at 12 pm (1100 GMT). The protests are set to take place in cities including Berlin, Munich, Cologne, Leipzig and Stuttgart. It is unclear how large the turnout will be and how long the protests will last. Last Generation said their actions will be disrupt…