OCEAN PLASTIC

80% of the world’s ocean plastics enter the ocean via rivers and coastlines. The other 20% come from marine sources such as fishing nets, ropes, and fleets. 

To tackle plastic pollution we need to know where these plastics are coming from. Previous studies suggested that a very small number of rivers were responsible for the vast majority of ocean plastics: 60% to 90% of plastics came from only ten rivers. 

Higher-resolution mapping and consideration for factors such as climate, terrain, land use, and distance to the ocean suggests that many smaller rivers play a bigger role than we thought. It takes 1,600 of the biggest emitting rivers to account for 80% of plastic inputs to the ocean.

It is estimated that 81% of ocean plastics come from Asian rivers. The Philippines alone contribute around one-third of the global total. Since the number of contributing rivers is much higher than previously thought, we will need global efforts to improve waste management and plastic collection rather than targeting only a few of the largest rivers - link