Marine debris
There are over 5 trillion pieces of plastic in the ocean, accumulating in the 5 subtropical gyres, the largest being the Great Pacific Garbage Patch (GPGP). The Ocean Cleanup, a foundation focused on removing plastic pollution from the oceans, will launch its first cleanup system inside the GPGP next month. A full-scale roll-out of this 600m floating system is estimated to clean 50% of the GPGP in just 5 years. (http://bit.ly/2wgjWVG, https://go.nature.com/2Bzr8BT)