According to a study by Alexander Wissner-Gross, PhD, physicist at Harvard University and environmental activist, an average website causes about 0.02g (0,0008oz.) of carbon dioxide for each visit. Assuming an average blog gets 15,000 visits a month, it has yearly carbon dioxide emissions of 3,6kg (8lb.). This can mainly be tracked back to the immense energy usage from (mainframe) computers, servers, and their cooling systems.
The Arbor Day foundation is planting trees in Spring 2010 to help neutralize the carbon dioxide emissions from blogs (they have actually already begun). For every single one of the participating blogs, “Make it Green” and “Arbor Day Foundation” are planting a tree in Plumas National Forest, which was damaged from fire in 2007. With your support, we are helping reforest Plumas National Forest with as much trees as possible. In the spring of 2010, Douglas-fir, red and white firs, and incense cedars will be planted alongside ponderosa pine and sugar pine trees. These new trees will help prevent soot and soil runoff into Plumas’ precious water supplies.
I can’t imagine that my blog gets 15,000 visits a year, much less in a month… but planting trees can only improve the environment that I help pollute in other ways and allow more people to be thankful for green. If you would like to join in, see http://www.kaufda.de/umwelt/carbon-neutral/how-you-can-join/ for more information. (Some information from that site was copied for this post as well).