There is an existing biochar discussion group at http://tech.groups.yahoo.com/group/biochar/

You can subscribe to the Yahoo group by going to the URL shown above.

There is also a newly formed Google group at http://groups.google.com/group/biochar.

If you have a Gmail account, you can subscribe to the Google group by logging into your account and going to http://groups.google.com/group/biochar. Click the "Join this group" link on the right-hand side of the page under "About this group."

If you don't have a Gmail account, subscribe to the Google group by sending an email to biochar-subscribe@googlegroups.com. You will receive a confirmation email. Follow the instructions to confirm your subscription.

Subscribers can post a message to the group by sending an email to biochar@googlegroups.com. If you have a Gmail account, you can also post messages via the web at http://groups.google.com/group/biochar.