Cutting down a virtual redwood with a virtual chainsaw may lead you to save trees by recycling more paper. That finding is an example of how real-world behavior can be changed by immersing people in virtual reality environments -- a notion that is at the heart of work under way in Stanford's Virtual Human Interaction Lab. Related article: http://news.stanford.edu/news/2011/april/virtual-reality-trees-040811.html Stanford University: http://www.stanford.edu/ Stanford News: http://news.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanford