Earth Angels

One thing about people: no place on earth can hide from them. Human beings are the only species in history to be able to go everywhere in the world, and how we handle that capability may define our nature.

Among us are a few who have assumed this responsibility with intelligence, valor, wonder and an appreciation that the earth is one intricate ecosystem by which all of life is shaped. They are Heroes for the Planet (though they would hardly think of themselves as such), and they have gladly taken on the task of protecting the natural world from stupidity, greed and careless commerce.

In a series of special reports over the next two years, TIME honors those people and the beautiful, fragile place where they work. We begin in water.