They 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.
Who are they? They are a German based company called kaufDA, which provides advertising brochures of local stores online to help consumers search for specific products and find good deals in their neighborhood. This reduces the amount of brochures printed and so the project helps the environment by reducing unnecessary paper in mailboxes. An American on average receives 41 pounds of junk mail per year. This has the same carbon footprint as burning six gallons of gasoline.
How do they actually neutralize your blog's carbon footprint? They are planting trees in cooperation with the Arbor Day Foundation in Plumas National Forest in Northern California. Thousands of wildfires have burned in many national forests over the past ten years and 88.000 acres of Plumas' were destroyed by 2 fires in 2007. For every participating blog, they plant a tree. Bloggers all over the world can help. One blog - one tree.
Why is a German company helping to plant trees in California? They actually plant trees, both in Germany (in the upper Harz region) and in Northern California. The reduction of carbon emissions by planting trees has the same effect, regardless of where in the world the trees are planted.
For more details and to find out how you can participate please go to http://www.kaufda.de/umwelt/co2-neutral/my-blog-is-carbon-neutral/