Today, over 15,000 blogs with a combined reach of over 12 million have pledged to blog something about the environment. What are they all talking about? Well, bloggers being bloggers, all kinds of stuff. Lots of tips for greening yourself up. Favorite headline I've seen so far, "Energy Vampires", and my vote for most intriguing goes to "Optimized code could help reduce global warming" (but that could just be my inner geek speaking).

There is still time to participate, just register on the Blog Action Day website and post away. Need ideas? Read what other people are posting.

Big thanks to the organisers who have made Greenpeace one of their official charities for donations. Nice one!

And stay tuned, we'll be adding more Blog Action Day posts right here all day.