By Alberto PEÑA / AFP Hidden inside pristine forests in Chile’s deep south, known as the end of the world, lie potential early warning signs of climate change. Hidden inside pristine forests in Chile’s deep south, known as the end of the world, lie potential early warning signs of climate change. Puerto Williams on Navarino island, which is separated from the South American mainland by the Beagle Channel, is the world’s southern-most town. Far from the pollution that blights major urban and industrial centers, it is a paradise that provides unique conditions to study global warming. “There is …