Greta Thunberg's long yacht and catamaran voyages to attend climate summits in 2019 to reduce her carbon footprint contributed to raising awareness of the pollution caused by airplanes.
Barcelona's local government is on the same page as the young activist and has proposed scrapping all flights between the Catalan and Spanish capitals.
The Barcelona–Madrid route, both by plane and by high-speed train, is the most popular one within Spain's borders.
A flight between both cities takes roughly an hour, with passengers landing at airports in the city outskirts. Meanwhile, traveling by train – which requires less time for security checks – takes two and a half to three hours depending on the number of stops it makes along the way, but successfully connects both city centers.
"The Barcelona-Madrid route already has an alternative by train, which emits no emissions, and which has a similar travel time," local councilor Eloi Badia said recently in an interview with local Betevé TV.
"We think emitting CO2 is not necessary when there is an alternative train link," he added.
The local council, led by left-wing mayor Ada Colau, plans to put the measure forth in an upcoming meeting on the climate emergency with the Catalan and Spanish governments as well as the heads of Barcelona's port and airport, both managed by Spanish authorities.
It is very difficult to get one-way high-speed Barcelona-Madrid train tickets for less than €65, and prices are significantly lower for flights when booked in advance.
A new low-cost train link for the route will be launched on April 6, with prices ranging from €10 to €60.
Barcelona's council instated a low emissions zone from January 2 that blocks highly polluting private vehicles from driving in the city on weekdays.