Hundreds of environmental activists are set to protest on Sunday against the massive expansion of US electric carmaker Tesla’s factory outside of Berlin. Also planned is a second rally by local residents who want to show their solidarity with Tesla and who support the project as part of the area’s future development. Police will accompany both events in the small town of Grünheide, which is located south-east of the German capital in an area known for its forests and lakes. Production at the giant factory was halted on Tuesday after a suspected arson attack on the power supply by a left-wing e…