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Video by "CBS Sunday Morning."

John Fielder is known as "Colorado's Photographer" to many people who have followed his work over the years.

He has attempted to capture what others almost never see: the beauty of the lands of that great state, both with and without humans.

All images by "CBS Sunday Morning" and John Fielder.

Along his journey, he came across the photographer William Henry Jackson, who did just about the same thing — 100 years earlier.

He decided to reproduce some of the best photos 100 years later.

The result? A stunning collection of photographs that got people talking and thinking.

You see, Fielder used the book and in-person appearances to talk about the impact we have on the natural world and what we're losing (and about to lose) to global warming.

It's a powerful way to turn photographs into action.

And, ummm ... I looked for the book online. Gulp ... it's so popular, it fetches $200 and up! Maybe there'll be another edition? We can hope.

Here's a few more images that Fielder has captured over the years.