As my friend Joe Lamb, who’s a tree surgeon and poet with a degree in evolutionary biology, remarked to me, “One way of looking at trees is that they are captured light. Photosynthesis, after all, captures a photon, takes a little energy from it before re-emitting it at a lower wavelength, and uses that captured energy to turn air into sugars, and then sugars into the stuff that makes leaves, wood, and roots. Even the most solid of beings, the giant sequoias, are really light and air.”