"We have underestimated the importance of trees. They are not merely
pleasant sources of shade but a potentially major answer to some of our
most pressing environmental problems. We take them for granted, but they
are a near miracle. In a bit of natural alchemy called photosynthesis,
for example, trees turn one of the seemingly most insubstantial things
of all — sunlight — into food for insects, wildlife and people, and use
it to create shade, beauty and wood for fuel, furniture and homes."