Plant/Crop-Based Renewable Resources 2020: A Vision to Enhance . Economic Security Through Renewable Plant/Crop-Based Resource Use was published in January 1998 (see Directions, Goals, and Targets on page 10 and back cover for print and electronic availability information). Among other things the vision document set a target of using plant-derived materials to meet 10% of chemical feedstock demand by 2020—a fivefold increase. The vision document generated widespread support and led to the formation of the multi-industry Executive Steering Group (see Appendix 1), which authored this roadmap for meeting that target. .