Flying in and out of Singapore, home to Southeast Asia's busiest airport, will get slightly more expensive this year as the city state begins imposing a levy of between 75 cents to $32 per ticket to fund sustainable aviation fuel.
The tax will support Singapore's growing use of the cleaner burning fuel, which is often made from used cooking oil or agricultural waste. The global aviation industry is encouraging its use as it tries to slash rising emissions that contribute to climate change without altering current aircraft.
