Matevz Lenarcic hugs his wife after landing in Brnik Airport April 19, 2012. Biologist and environmentalist Lenarcic set off on January 9 on a journey around the world in an ultra-light aircraft. He aims to break the records for the lightest aircraft and the least amount of fuel used to fly around the world, while raising awareness of global air pollution. Lenarcic flew the Virus SW914 ultra-light single-engine airplane produced by Slovenian company Pipistrel. The aircraft is a modified version of one of their earlier models which won awards in NASA-sponsored competitions for its exceptional fuel efficiency in 2007 and 2008. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SCIENCE TECHNOLOGY TRANSPORT SOCIETY ENERGY)