Concerned about the state of our beaches and ocean, or lakes and rivers, then this Be the change T-Shirt might be the one for you.  The full quote, "Be the change you wish to see in the world" is apt advice, but is often mis-attributed to Mahatma Ghandi which it's really a summary of Ghandi's actual quote as follows:

"We but mirror the world.  All the tendencies present in the outer world are to be found in the world of our body.  If we could change ourselves, the tendencies in the world would also change.  As a man changes his own nature, so does the attitude of the world change towards him.  This is the divine mystery supreme. A wonderful thing it is and the source of our happiness.  We need not wait to see what others do."

It's the last sentence that gets rephrased from don't wait to see what others do to be the change you wish to see in the world.  And as it pertains to the current state of the beaches, ocean, lakes and rivers, the sooner we get started the better especially as 2021 - 2030 is the United Nations Decade of Ocean Science for Sustainable Development.  A Gildan unisex t-shirt that is 100% cotton and preshrunk, the color is Blue and sizes are Small (32 - 34" chest), Medium (36 - 38" chest), Large (40 - 42" chest) and Extra Large (44 - 46" chest).