Air passengers departing Singapore will pay a green fuel levy of as much as S$41.60 (US$31.95) from next year as the city state locks in a major step in its effort to cut the aviation industry’s emissions. Travellers flying in economy and premium economy, as well as those on short-haul routes, will be charged far less. Those customers will pay an additional S$1 for trips to Southeast Asia and S$10.40 for flights to the Americas, the Civil Aviation Authority of Singapore said on Monday. Business...