Photosynthesis:The process used by plants, algae, and certain bacteria to harness energy from sunlight into chemical energy.
Carbon Cycle: The series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration.
Greenhouse Gas: A gas that contributes to the greenhouse effect by absorbing infrared radiation. Carbon dioxide is one example.