The spot where a floating storage and regasification unit will be set up is seen in front of the port city of Piombino, Italy, October 20, 2022.
Such a big-scale project will help Italy avert a supply crunch it could otherwise face next winter, but keep it hooked on gas for longer, slowing down its transition to renewable energy.
A new rightist government, widely expected to be led by Giorgia Meloni, could be sworn in as soon as next week, with no sign that Rome's line on Piombino project - endorsed by Italy's industrial lobby Confindustria - could be changed.
With little domestic gas production and a ban on nuclear power generation, Italy heavily relies on imports for its energy needs.
Some local and environmental grassroots associations and unions gathered in Piombino on Thursday for a rally against the project.