Even in the early heydays, Henry Ford was fond of using plants like hemp and straw to reinforce plastic components for his cars. Now bioplastics are back and turning up in cell phones, forks, and more. Ford Motors started trying out soy-based seat foam a few years back, and is now expanding its palette of plant plastics. It's a small step, but the 2010 Ford Flex will be the first car to feature a plastic part that contains wheat straw.