Reinforcing fiberglass is still today the world's most used fiber for composite reinforcement. However, other fibers are today increasingly considered when it deals with polymer reinforcement. Carbon fiber (CF) consumption is growing at a two-digits rate; the global CF consumption in 2011 is expected to be at 47,000 tons but should be triple by 2020 (see the upcoming market study report by Anthony Roberts, which will be published later this year by Materials Technology Publications); therefore, CF production capacities are limited vs. the currently strong global demand (partly due to the booming wind energy market segment). Natural fibers are now entering the game with a strong advantage: their inherent environmentally friendliness......