While governments around the world have been dragging their feet to reduce carbon emissions, surprisingly, some airlines have taken it upon themselves to use alternative fuels in a bid to cut emissions. Singapore Airlines recently decided to partner with the Civil Aviation Authority of Singapore (CAAS) to start offering 12 nonstop flights using a mix of biofuel and jet fuel alongside optimized flight operations; this will be for flights between Singapore (SIN) and San Francisco (SFO).

Currently, for the route, Singapore Airlines uses the A350-900 aircraft, which is already a fuel-efficient plane. The airline actually already successfully flew between the two cities using biofuel, when Flight 31 flew from San Francisco to Singapore on May 1. The flight with over 200 passengers on board went off without a hitch, and the 10 remaining flights using biofuel will operate weekly.

The airline is using biofuel on select flights and is trying to raise awareness for biofuels. Singapore Airlines expects to cut emissions by around 15 metric tonnes per flight. According to a recent press release, Singapore Airlines hopes to see sustainable biofuels used all around the country and world.

Singapore Airlines is serious about climate change and doing its part in offering more environmentally-friendly flying options. In 2010, the airline joined the Asia and Pacific Initiative to Reduce Emissions (ASPIRE) program. On its LAX-SIN demonstration route, via Tokyo, the airline was able to reduce its fuel usage by six percent.

Singapore Airlines isn't the only one getting in on the act. Last year, United Airlines entered into an agreement with AltAir Fuels, over a three-year period, to buy up to 15 million gallons of biofuel, and in the process, reduce carbon emissions by approximately 60 percent. Cathay Pacific is also planning to use biofuels, on flights to Hong Kong from the United States beginning in 2019. The carrier hopes to shave emissions on these flights by 80 percent.