; (2) the embodied carbon involved in the manufacture of products, using data from published environmental product declarations and life cycle assessments, updated as new and more refined data becomes available; (3) the long-term stored carbon in manufactured timber products; and (4) the carbon displacement of wood products, compared to other materials, using substitution factors. (d) Rule of construction Nothing in this section may be construed to provide authority with respect to the generation, consumption, or trading of carbon or environmental credits from National Forest System lands in any voluntary or compliance environmental markets. 8434. Biochar application demonstration project (a) Definitions In this section: (1) Biochar The term biochar means carbonized biomass produced by converting feedstock through reductive thermal processing with limited oxygen for non-fuel uses. (2) Eligible entity The term eligible entity means— (A) an individual; (B) a public or private entity