Our plane travel needs to become more sustainable, but how? Innovators around the world are working on solutions ranging from battery power to biofuels.  *This series is supported by DELTA. VICE News retains full editorial authority. Subscribe to MOTHERBOARD: http://bit.ly/Subscribe-To-MOTHERBOARD Follow MOTHERBOARD Facebook: http://www.facebook.com/motherboardtv Twitter: http://twitter.com/motherboard Tumblr: http://motherboardtv.tumblr.com/ Instagram: http://instagram.com/motherboardvice More videos from the VICE network: https://www.fb.com/vicevideo