Talking to reporters before her departure from Plymouth, climate activist Greta Thunberg has admitted her journey across the Atlantic on a sailboat is "a big challenge".
The two-week voyage across the ocean will take her to New York for a UN climate summit next month.
Thunberg will make the zero-carbon journey after she announced last month she would no longer fly to environmental conferences.
She will also attend a summit in Santiago, Chile, in December. Report by Avagninag. Like us on Facebook at http://www.facebook.com/itn
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