| Subject |
|---|
| overexploitation--history [1] |
| ownership [23] |
| ownership--history [2] |
| ownership--policy [1] |
| ownership--theory [1] |
| oysters [12] |
| ozone layer [2] |
| ozone layer--policy [1] |
| Pacific Ocean [4] |
| palm [6] |
| panaceas [3] |
| panchayats [14] |
| pandemic [2] |
| Pangani River [1] |
| panthers [3] |
| papyrus [1] |
| paradigm [2] |
| PARETO OPTIMALITY [1] |
| pareto optimality [1] |
| parks [106] |