Through Scientific American I found a way to offset the carbon footprint of my website.  The company, CO2Stats, provides a free carbon offset counter that automatically counts the carbon footprint caused by visitors to the site, mostly from the energy consumed by the computers used to access and host the site.  What is great is that on the basis of the counter, CO2Stats invests in renewable energy projects from web advertising and sponsors.  Whew, one more thing off my back!