It’s a regular sight for early risers at a tropical resort.  While tourists sleep, staff rake up any rubbish that may have washed onto shore through the night.  By the time mimosas are served, the beaches are back to glistening and the trash bins are tucked away from paying eyes.  
Today, water pollution and its environmental issues are a major cause of concern around the world.  My first real encounter with the problem occurred while on a trip...