Biokerosen is made from cooking oil in restaurants, the procedure based only on recycling of burned oil. It does not seem to affect the quality of the flights, but has the advantage of reducing carbon emissions by up to 80%.

In 2011, the Dutch company made its first flight with a biokerosen fueled airplane produced from recycled oil between Amsterdam and Paris and in 2012 made the first intercontinental flight to Rio de Janeiro, marking the longest flight made by airplane biofuel.

Starting in 2013, KLM has started to use 75% of its fuel for airplanes for its transatlantic flights and 25% for cooking oil, according to the BBC.

KLM recorded a record of 34.1 million passengers in 2018, offering its passengers direct flights to 162 destinations with a modern fleet of over 214 aircraft. The airline has over 33,000 employees worldwide.

Dutch airline KLM announced it will finance a new aeronautical project that could change the aviation industry.
It's a new V-shaped aircraft, created by experts from the Technical University of Delft, the Netherlands, and financially supported by KLM.

"Flying-V" can carry up to 314 passengers and was named after the famous Gibson Flying-V electric guitar, used by artists such as Eddie Van Halen or Jimi Hendrix.

Creators say that due to the unique configuration, the new aircraft uses 20% less fuel than the classic planes, so they will considerably reduce carbon monoxide emissions. The wings could accommodate passengerscargo and other loads.

The size of the new airplane is similar to an Airbus A350 or Boeing 787 and could use existing gates, hangars and tracks.