Feature: Act now -- Greek UNEP prize winner calls for efforts against marine pollution

Photo taken on Dec. 17 shows a plastic bottle collected by fishermen at the port of Keratsini, a port suburb of Piraeus, Greece. With a vision to make the ecosystem sustainable, Lefteris Arapakis in 2016 co-founded Enaleia, a social start-up that helps recycle and upcycle marine plastic waste. For his innovative idea and consistent efforts for sustainable environmental change, the 26-year-old was named earlier this week as one of the UN Environment Program's (UNEP) seven Young Champions of the Earth for 2020, along with Chinese environmentalist Ren Xiaoyuan and others. (Photo by Lefteris Partsalis/Xinhua)