Environmental activist Greta Thunberg is a long way from where she needs to be. Since a UN speech in New York in late September, the 16-year-old Swedish campaigner has spent weeks traveling overland en route to the COP25 climate summit in Santiago, Chile. But a last-minute change of location due to that city’s anti-government protests—the event will now be held in Madrid, Spain—has left her scrambling for an eco-friendly lift across the Atlantic.

Thunberg, who started the now-international student climate strikes in late 2018, appealed to her fans to help her get to Madrid by Dec. 2, promising gratitude to whoever could help her find transport.