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An intrepid French traveler embarked on a solo rowing expedition on Monday from Poland to France, to shed light on the pollution of the waterways of Europe. Christophe Gruault, 58, set off from Poland's capital Warsaw in a customized rowing boat six meters long and only 60 centimeters wide, with hopes to reach Paris on June 18. His intended route of 2,023 km will lead through five countries -- Poland, Germany, the Netherlands, Belgium and France -- and along 22 of the continent's rivers. Gruault plans to raise awareness by meeting high school students and contributing to scientific research on what is polluting Europe's rivers and causing them to dry up.