Climate activist Greta Thunberg has said she will continue to "put pressure on people in power," after completing her journey across the Atlantic Ocean for the COP25 conference in Madrid on Tuesday.

Climate activist Greta Thunberg has said she will continue to "put pressure on people in power," after completing her journey across the Atlantic Ocean for the COP25 conference in Madrid on Tuesday. https://t.co/uRQPzHDXqr

— CNN International (@cnni) December 3, 2019