Remove all waste
Removing any waste you find during your water activities is easy as (fish) pie! It's just a question of habit. Always bring along a mesh bag during your snorkelling or scuba diving sessions, or a rubbish bag when going to the beach. See some rubbish? Don't just look at it and huff, do something: pick it up! This small, environmentally responsible action is the best way to stop seeing waste in marine environments.