I saw it on slashdot but the orig article is below:
"World’s first green fuel levy to add almost US$32 to air fares"
[snip]
(Nov 10): 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 key 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 Monday. Business and first class travellers will pay four times more, it said.
...Passengers transiting through the city-state won’t need to pay the fee.