"On most days, Barcelona is noisy, its air toxic. But this Friday, most of the city was quiet and breathable, traffic arteries blocked, cruise ships rerouted and flights canceled. Briefly, and partially, Barcelona felt like a climate-compatible city of the future, even if its engines had been shut down for other reasons altogether. The noise and smell, normally everywhere, had been focalized by mass demonstrations, riot police and swerving helicopters, and as night fell, burning barricades."