system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why are plants green?


assistant
While not every plant is green, many are green because of the presence of chlorophyll which typically occurs in the leaves of plants. Chlorophyll is a green pigment which assists plants in the process of photosynthesis, where the plant converts light into energy. Chlorophyll absorbs all light except green, which is reflected to the observer.