The Man Who Planted Trees is an amazing feel-good essay with a pretty self explanatory title.
On a related note, there have been vigils to prevent the felling of trees in Bangalore. Go here to find out more.
I heard about the vigils this past Saturday at a festival called Bhoomi Jathre which is an all night music festival hosted by Fireflies, an eco-ashram outside Bangalore. I can't seem to find organized info about when they're held though.
The music festival, by the way, was a lot of fun. I wasn't sure what to expect; the description made me think of Anjuna Beach in Goa, but then I figured there probablyn't wouldn't be too much chemical consumption while listening to indian classical music at an eco-ashram. It was a nice mix of both. Some great organic food stalls, indian classical music, jazz, traditional/fusion dance, art exhibitions. I wanted to scan tickets to keep as a momento, but I left them in my short pockets and they got obliterated in the washing machine.