| http://www.w3.org/ns/prov#value | - All rights reserved.This water wheel is the most promising solution to ocean plasticSCIENCEALERT STAFF 23 JUL 2014Image: Andrew David ThalerThere???s no way to know for sure, but scientists estimate the amount of plastic bobbing around the world???s oceans is around 1 million tonnes - and that???s a conservative estimate.
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