Air passengers departing Singapore will pay a green fuel levy of as much as S$41.60 ($31.95) from next year as the city-state locks in a key step in its effort to cut the aviation industry's emissions. From a report: Travelers 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 Monday. Business and first class travelers will pay four times more, it said. [...] The funds collected from passengers will go to the centralized purchase of sustainable aviation fuel -- typically made from waste oils or agricultural feedstock -- as Singapore looks to achieve a SAF adoption rate of 3% to 5% by 2030.Read more of this story at Slashdot.