I was contacted by Christin Gericke from a German initiative called "Make it green!". Their goal is to take part in reducing the carbon footprint by raising awareness of the severe environmental damage caused by carbon emissions . One of their activities is to raise awareness of the carbon emissions resulting from the use of the internet - specifically of blogs. Christin's letter best explains what this is all about, so I'm pasting part of that here:
A blog with 15,000 visits a month has a yearly carbon dioxide emissions of 8lb. To neutralise these emissions we have created "My blog is carbon neutral" buttons so bloggers can demonstrate that they care about the environment and the carbon footprint of their blogs. We present them a small but nontheless worthy solution to contribute to environmental issues. Our idea is to show possibilities to make a contribution to protect the environment.
To find out how you can participate please visit http://www.kaufda.de/umwelt/carbon-neutral/how-you-can-join/
And how do we actually neutralize your blog's carbon footprint? We are planting trees in cooperation with the Arbor Day Foundation in Plumas National Forest in Northern California for our project to neutralize the carbon footprint of blogs. Thousands of wildfires burned down many national forests over the past ten years and 88.000 acres of Plumas' were destroyed by two fires in 2007. To help replanting we need the support of bloggers all over the world! For every participating blog we plant a tree. One blog - one tree.