held at Jacarepaguá but parts of that circuit (which was originally built on a swamp) were beginning to sink into the soft ground and the circuit disintegrated badly, so the 1980 Grand Prix was to be relocated to Interlagos. But by this time, the population of São Paulo had risen from 5 to 8 million over the space of 10 years; the area surrounding the track was becoming increasingly run-down and surrounding the circuit did not look good for Formula One, which thanks to worldwide television exposure was becoming something of a glamorous spectacle. Formula One was originally supposed to come back to Interlagos for the 1981 season after the track surface there would be repaved; it turned out that F1 came back a year too early. The drivers were dissatisfied with the safety conditions of the very bumpy Interlagos circuit which had not been changed after the previous year's improvements. The ground-effect wing cars of that year had a tendency to bounce up and down thanks to the suction created by the cars' wing-shaped underbodies, and they were more stiffly suspended than before; so these fragile cars were barely tolerant of such a rough track and were very unpleasant to drive. The bad surface was so rough that the bumps caused mechanical problems for some cars. Also, the barriers and catch-fence arrangements were not adequate enough for Formula One. Jody Scheckter attempted to stop the race from going ahead but this did not work and the race ended up being won by Frenchman René Arnoux. With Formula One's more glamorous image being better suited to the better-looking city of Rio de Janeiro, the F1 circus went back to Rio again and the circuit went on to host the 1980s turbo era. Jacarepaguá, Rio de Janeiro In the Brazilian Grand Prix moved to Jacarepaguá in Rio de Janeiro. Argentine Carlos Reutemann dominated in his Ferrari, which was equipped with superior Michelin tyres. This proved to be the French company's first victory in Formula One. Reutemann was followed by home favorite Fittipaldi and defending champion Niki Lauda. After the emergence in 1980 of Rio de Janeiro racer Nelson Piquet, the decline of Interlagos and the retirement of Fittipaldi, Brazilian fans lobbied to host the Brazilian GP in Piquet's home town. The flat Jacarepaguá circuit, like Interlagos before it, proved to be extremely demanding: most corners were long and fast, some were