International Biochar Initiative IBI Technical Bulletin #103
Using biochar to create artwork in the landscape
Biochar is mostly composed of highly stable forms of black carbon and it can be used as a tool for carbon sequestration in soil. There is also interest in using biochar to create permanent landscape art, including as part of projects (such as 350.org) aimed at raising public awareness about climate change mitigation. This is a relatively new idea, and this Technical Bulletin is intended to provide ideas for creating biochar designs in the landscape. It also lists precautions which must be taken when embarking on such projects.
For instance, you should always test your biochar first to make sure it will give you the result you want. See IBI Technical Bulletin #101: Quick tests to determine whether a biochar material contains compounds that are potentially harmful to plants.