Thirteen people have been arrested following a forest fire on the Greek island of Hydra, that authorities allege was sparked by fireworks launched from a superyacht.Friday’s blaze burnt through 300 acres of the only pine forest on the renowned tourist island, which lies south of Athens, Greece’s Climate Crisis Minister Vassilis Kikilias said.The flames were brought under control, but with difficulty. As there are no roads to the beach, firefighters had to access it by sea, while helicopters dropped water from the air.Greek media reported that all those arrested are crew members of the…