When is it environmentally preferable to use electronic or printed media? Not very recent information but a useful addition to the research. This study by Tejo Pydipati in October 24, 2010 and submitted as coursework for his Physics 240, Stanford University, Fall 2010
It is concluded that where a document must be read only once with normal reading speeds (like e-mail), it is probably better to use a laptop. If it is to be reused many times over, it certainly wouldn’t hurt to print.