Climate activist Greta Thunberg has arrived in Portugal after completing a voyage across the Atlantic, as the teenager prepares to speak at a climate summit in Madrid. The Swedish campaigner, 16, and her father Svante travelled more than 3,000 miles from Hampton, Virginia to Lisbon aboard a 48-foot catamaran, the La Vagabonde. Greta, who became world famous for founding the 'school strikes for the climate' movement, refuses to fly in ...