Swedish teen activist Greta Thunberg on Wednesday set sail from the U.S. East Coast for a three-week journey to Spain to attend a U.N. climate conference in December.Thunberg, avoiding the greenhouse gas emissions of air travel, had sailed to New York from southern Britain on a zero-emissions yacht to attend the U.N. Climate Summit in September, and has opted for yacht travel again in crossing the Atlantic Ocean to Spain.An Australian couple who support Thunberg's activity will sail the yacht.The 25th session of the Conference of the Parties on climate change, dubbed COP25, was originally s…READ FULL ARTICLE