- KLM recently flew from Amsterdam to Aruba using sustainable jet fuel
- The 10-hour flight was the longest to ever use biofuel
- KLM is founding partner of SkyNRG, a supplier of sustainable jet fuel
(CNN)When it comes to the environment, aviation has a rather dirty reputation. The industry produced 689 million tons of CO2 in 2012, according to Air Transport Action Group (12% of global transportation's carbon dioxide emissions) -- a number that is sure to grow as global demand for flight continues to skyrocket.