GPL licensed.
Info link: http://emptynestthemes.emptynestheritage.com/2011/11/15/green-world/
Demo link: http://emptynestthemes.emptynestheritage.com/DemoBlog//?preview_theme=Green%20World.png
Download link: http://emptynestthemes.emptynestheritage.com/wp-content/plugins/download-monitor/download.php?id=153