Students and lecturers from the Center for Environmental and Climate Politics were already part of the “Critical Mass” in April. As a participatory observation, the contribution of cycling to a possible transformation of mobility, away from a car-centered city, was explored. Several thousand cyclists set off at 8 p.m. on the last Friday of every month from Mariannen-/Rio-Reiser-Platz in Kreuzberg. On 27 June, the Center will be joining the mass again.