One day at the beach we noticed someone picking up starfish that had been washed ashore at low tide.

 

One at a time he was throwing them back into the sea. When we asked why, he replied "If I don't they'll die from lack of oxygen."

 

"But there are thousands of starfish on this beach and thousands more on other beaches, you can't possibly make a difference," we said.

 

Throwing another starfish back into the sea, he smiled and shouted jubilantly "Made a difference to that one!"

 

And one by one we all can.