glowing trees might look cool just like glowing cats they've actually made, and the idea of replacing streetlights with trees is nice, but the reality is that nanotechnology is a nefarious practice and will destroy nature, so it's not such a great idea at all and I would cry if it happened. no matter how much I love glowing stuff, it wouldn't be worth it.. on another note, an Astronomer teacher I once said that they had the light from streetlights going in the wrong direction and most of the light was wasted by pointing too toward the sky, which deprives us from seeing as many stars and does an insufficient job lighting the streets. I would love to see a new improved alternative to traditional street lights that we have most places now, but destroying nature with nanoparticles is not the answer and if they really try to implement this then people will need to stand up and stop it, or else....
Lorax