Jakub Bures, Jan Kara, Jan Brand and Jan Holan pedal their boat, made with plastic bottles, on the Elbe river in Nymburk. Kara, a 22-year-old student and Bures, a 22-year-old car mechanic, built the 10-metre (32.8-feet) long boat from 5000 plastic bottles strapped to a wooden frame. The four men plan to pedal from their hometown Nymburk down the river Elbe to Hamburg in Germany to draw attention to an increasing plastic pollution in Europe, they said.STRINGER/Reuters