Out on the calm, clear, jade green-blue water of the Golfo Dulce (“Sweet Gulf”) in southern Costa Rica, it is easy to think this must be one of the most pristine, beautiful places on Earth. And it is. This inner sea is a critical habitat for endangered migrating southern Pacific humpback whales, dolphins and sharks, among other marine life.
Then our boat passes a small patch of floating plastic bottles, chips bags and other random flotsam. Trash. Human trash. And we are reminded that if anything
