A relatively new branch of medicine, the therapeutic laser delivers a concentrated and controlled amount of light energy into the damaged area. (birdneckanimalhospital.com)
The silicon turns a good portion of light energy into electricity, but it is expensive because big crystals are hard to grow. (scientificamerican.com)
One way of making these processes cleaner is by using light energy, similar to how photosynthesis operates in nature. (sciencedaily.com)