Taxi drivers throw fake money in the air during a protest in Barcelona downtown, Spain, Thursday, March 18, 2021. Hundreds of yellow-and-black cabs disrupted Barcelona's road traffic on Thursday to protest against the return of the ride-hailing giant Uber to the northeastern city after a 2-year hiatus. (AP Photo/Emilio Morenatti)

Taxi cabs move slowly blocking the traffic along one of the avenues in Barcelona downtown, Spain, Thursday, March 18, 2021. Hundreds of yellow-and-black cabs disrupted Barcelona's road traffic on Thursday to protest against the return of the ride-hailing giant Uber to the northeastern city after a 2-year hiatus. (AP Photo/Emilio Morenatti)

Taxi cabs move slowly blocking the traffic along one of the avenues in Barcelona downtown, Spain, Thursday, March 18, 2021. Hundreds of yellow-and-black cabs disrupted Barcelona's road traffic on Thursday to protest against the return of the ride-hailing giant Uber to the northeastern city after a 2-year hiatus. (AP Photo/Emilio Morenatti)

A taxi driver stands next to his cab as they march slowly blocking the traffic along one of the avenues in Barcelona downtown, Spain, Thursday, March 18, 2021. Hundreds of yellow-and-black cabs disrupted Barcelona's road traffic on Thursday to protest against the return of the ride-hailing giant Uber to the northeastern city after a 2-year hiatus. (AP Photo/Emilio Morenatti)