Photo taken on Jan. 31, 2018 shows mobile phone cases made of dead leaves of sea grass in Athens, Greece. Hundreds of tons of dead leaves of sea grass are washed up on Greek shores each year. Most of them end up in landfills as waste. Thanks to the young Greek innovator Stravros Tsompanidis, the founder of startup PHEE, an increasing quantity in the past three years has been given a second life after being transformed into unique, useful, ecological products. (Xinhua/Marios Lolos)