The most comprehensive site of Kelly's is www.greenhomebuilding.com which covers all aspects of sustainable architecture and natural building, especially as it relates to residential architecture. This site features general guidelines for building green and living more sustainably; there are many suggested books and other media for more in-depth study.

A panel of experts are willing to answer questions from the public and these questions and answers are published online. There is a calendar of workshops and related events happening around the world, a bulletin board and many links for further exploration. Kelly also has a blog with where he posts periodic topical comments.

Earthbagbuilding.com is an assemblage of an amazing array of information and illustrations showing how earthbags can be used to build all manner of homes, garden walls, root cellars, etc. Kelly adds to this site frequently.

Dr. Owen Geiger runs a blog on earthbag building at http://earthbagbuilding.wordpress.com and Kelly contributes to it as well. Owen writes there on many aspects of natural building.

Dreamgreenhomes.com offers for sale a variety of innovative and ecological house plans. This site acts as a consortium for selected architects and designers from around the world, presenting stock plans. These can generally can be customized to suit individual needs.

Kelly also has a small site, www.sunvee.com about the solar vehicle he invented and used to drive around our town in Colorado. This site profiles a number of other small electric vehicles, both solar powered and not.

Which-hobbit.com features an ebook Kelly wrote titled Which Hobbit Lives Here? Reflections on Society and Sustainability. This is a partially fictionalized autobiography.

Kelly is fascinated by the earliest of human history, and in his spare time he works on this massive project of pulling together what he learns. You can see the grid on the homepage of humanpast.net -- if you click through, you find pages of information.