Thousands of people marched in the Sicilian city of Messina on Saturday to protest a government plan to build a bridge that would connect the Italian mainland with Sicily in a massive 13.5-billion-euro ($15.

The government says the road and rail link will create jobs and lift the region’s economy, but critics are concerned about the environmental and social impact.

Italy has finally approved a €13.5bn (£12bn) plan to build the world’s longest suspension bridge from the mainland to Sicily – an idea first envisaged by the ancient Romans – despite concerns funds will be siphoned off by the mafia.