I remember reading this book as a child in the early- to mid-90s. A little boy is woken by someone (possibly a talking owl?) who takes him on a journey by causing his bed to fly to different parts of the world.
The boy is shown several scenes of environmental degradation (I recall deforestation and a landfill), as well as some of the wonders of the natural world (I recall redwood forests). The scene I remember most vividly was the bed flying through clouds at night to reveal a bay with bio-luminescent creatures.
The overall message of the book was one of environmentalism, to teach children about the wonders of our planet and the need to take care of it.
It was a large-format picture book with perhaps 20 to 30 pages. I may have seen it on Reading Rainbow, and I recall that it had won some awards for children's books. The picture style was very painterly and realistic.