The Malizia II caught the wind mid-afternoon Wednesday and the sleek sailboat sped away from Plymouth on its two-week journey.
The16-year-old activist is hitching a ride on the high-tech yacht to attend the U.N. climate summits next month in New York and in Santiago, Chile, in December. She has decided to take a year off from school to travel.
The 60-foot (18-meter) yacht is outfitted with solar panels and underwater turbines to generate electricity, allowing Thunberg to make a zero-carbon trans-Atlantic journey.
Thunberg says there will be challenges ahead, such as seasickness, but that she is looking forward to the adventure.
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