1. carbon cycle
all of the physical processes and chemical reactions that result in the movement of carbon between the biosphere (living forms) and the geosphere (water, earth, and atmosphere)
2. carbon footprint
an overall increase in world temperatures that may be caused by additional heat being trapped by greenhouse gases
3. global warming
components of the air mixture that trap infrared (heat) energy
4. greenhouse gas
a calculation that considers an individual's contribution to the process of global warming based on activities leading to greenhouse gas production