(Schmidt, 2004; Simpson and Hatcher, 2004b). However, the potential to enhance the
contribution that char makes to the natural carbon cycle through the addition of biochar in soil
is a topic of much public discussion and a rising profile in influential policy circles, for
example, in Australia (Garnaut, 2008). The contribution that such strategies can have on
climate change mitigation depends on attaining a much more extensive research base and
detailed economic analyses.