| A | B |
| practice of growing, breeding, and caring for plants and animals used for a variety of purposes | agriculture |
| study of how living things interact with each other and with their nonliving environments | ecology |
| conflict between short-term interests of individuals and long-term welfare of society | "The Tragedy of the Commons" |
| declining number and variety of the species in an area | loss of biodiversity |
| study of how humans interact with the environment | environmental science |
| law describing the relationship between an item's availability and its value. | supply and demand |
| characterized by high population growth rate, low energy use, and very low personal wealth | developing nation |
| state in which a human population can survive indefinitely | sustainability |
| characterized by low population growth rate, high life expectancy, and diverse industrial economies | developed nation |
| natural material that can be replaced relatively quickly through natural processes | renewable resource |
| the number and variety of species that live in the area | biodiversity |
| energy from the sun | renewable resource |
| mercury, lead, some plastics | nondegradable |
| may be broken down by natural processes | biodegradable |