The climate activist Greta Thunberg sailed back to Europe

After two and half months in the U.S, The 16-year-old Swedish climate activist Greta Thunberg set sail back to Europe from Hampton, Va., on Wednesday.

Thunberg won't fly, because of air travel's outsize emissions. La Vagabonde catamaran, owned by Australians Riley Whitelum and Elayna Carausu is outfitted with solar panels and hydro-generators, so it has a minimal carbon footprint. The couple lives on the 48-foot catamaran and travel around the world with their baby. The voyage is expected to take two to four weeks and Thunberg hopes to reach Spain in time for the climate conference taking place Dec. 2 to 13.

Mural of Greta

Thunberg has touched off a global movement with young people at the forefront. She decided to sail back to Europe “to highlight the fact that you can't live sustainably in today’s society. You have to go to the extreme.” Before departing from America, a four-story mural of 16-year-old climate activist Greta Thunberg (60-foot-tall by 30-foot wide) was completed in downtown San Francisco on Monday. The Argentinian muralist Andres Iglesias, who goes by the name Nino Cobre, clarified that the materials used were environmentally friendly. At the same time, was performed in the street the FANFARE FOR GRETA, composed by Jonathan Ring, inspired by Greta’s work.