Describe the sources of marine debris and explain why it is a problem with global origins.

Answer:

Marine debris comes from land-based sources such as litter, stormwater runoff, and waste carried by rivers, as well as ocean activities such as fishing, shipping, and recreation. Wind and water currents transport debris over long distances, so waste can cross national boundaries and affect oceans and coastlines far from its original source. This makes marine debris a global problem requiring action from many places.