The oceans are choked with discarded fishing nets, or ghost nets, that are estimated to kill 300,000 whales, dolphins and seals each year. It’s a grotesque and avoidable toll on nature, and one that Giulio Bonazzi, CEO of Aquafil, hopes to reduce using an unlikely ally – fashion. The Italian firm is pioneering the use of “ghost” or discarded fishing nets to make a synthetic fabric marketed under the name Econyl that’s currently being used…