Business Green: Anyone who paid attention in biology classes knows plants turn sunlight into energy through the process of photosynthesis. Well now a US company hopes to give plants another, rather more mechanical, role in turning solar power into usable energy, by using them as a key component in the manufacture of solar panels. California-based BioSolar has developed new bio-based polymers made from renewable plant sources that it claims will provide a cheaper and more effective alternative to the …