In this video/lesson series you will learn the role of chlorophyll in photosynthesis, and the role of pigments in making plants green (or making them appear green). Also in this collection: news stories from the archives of NBC News and Scientific American on chlorophyll, sunlight and biofuels, green things (trees, grass, algae) and, for fun, a 1990 story about crayon colors; plus a diagram of the electromagnetic spectrum, and maps of plant zones.