Business Green: Scientists at the University of North Carolina have developed a bendable ‘solar leaf’ that reacts with sunlight to produce electricity. The researchers are predicting that the material, based on a water gel, could be cheaper to produce than traditional silicon solar cells, and have a gentler impact on the environment. The water-based gel is doped with light-sensitive molecules that become excited by sunlight, in the same way that plant molecules are excited by sunlight to …