BAGNOLI, Italy, March 21 (Reuters) - Rusted factory skeletons loom over a shoreline poisoned by ⁠decades of heavy industry on the western fringes of Naples, which will next year host sailing's glamorous America's Cup.

Dredgers are deepening the seabed in readiness for the racing yachts, excavators are tearing up an old pier and crews ⁠are preparing the ground for what is meant to be a temporary harbour for the high-tech, carbon-fibre boats.