Why Is Grass Green?

Grass is green because of the presence of chlorophyll throughout the leaves and stems. Chlorophyll is a pigment that allows plants to capture energy from the Sun in order to power the process of photosynthesis. Given that most grasses lack trunks or woody stems like trees or shrubs, their aboveground bodies are mostly chlorophyll-rich leaves and stems, and, thus, the part you see is all green.