About eight million tons of plastic waste wound up in the world's oceans in 2010 and researchers warn that the cumulative amount could increase more than 10-fold in the next decade unless the international community improves its waste management practices.
Jenna Jambeck from the University of Georgia in Athens along with scientists from the US and Australia studied the sources of ocean-bound plastic around the world and developed models to estimate their annual contributions.
They suggest that coastal countries generated close to 275 million tons of plastic waste in 2010 -- and that 4.8 to 12.7 million tons of that plastic made its way to the oceans.
"Our estimate of 8 million metric tons going into the oceans in 2010 is equivalent to five grocery bags filled with plastic for every foot of coastline in the world," said Jambeck. "This annual input increases each year, so our estimate for 2015 is about 9.1 million metric tons".
"In 2025, the annual input would be about twice the 2010 input, or 10 bags full of plastic per foot of coastline," she continued. "So the cumulative input by 2025 would equal 155 million metric tons".
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