Over the last six decades, according to one estimate, 9.1 billion tons of plastic has been produced worldwide and 7 billion tons of it has ended up as waste. Much of that waste has infiltrated our oceans. And, according to another estimate, more than 8 million tons of plastic is dumped into the sea each year.
Researchers from the Helmholtz-Center for Environmental Research in Germany, think they’ve nailed down a crucial detail about plastic pollution: how it gets into the ocean. And, they found, just 10 rivers account for 90 percent of the plastics …
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