| 100% | PPM | 3 | Pollution concentration ratio (abbr.) |
| 51% | BMI | 3 | Dietitian's ratio: Abbr. |
| 50% | EPA | 3 | Pollution watchdog group: Abbr. |
| 50% | EPA | 3 | Pollution control organization: Abbr. |
| 50% | EPA | 3 | Pollution control agency: Abbr. |
| 50% | EPA | 3 | Pollution control group: Abbr. |
| 50% | EPA | 3 | Pollution-monitoring group: Abbr. |
| 50% | EPA | 3 | Pollution regulating organization: Abbr. |
| 50% | EPA | 3 | Pollution-regulating organization: Abbr. |
| 50% | EPA | 3 | Pollution-monitoring organization: Abbr. |
| 50% | COS | 3 | Trig ratio: Abbr. |
| 50% | BMI | 3 | Fitness ratio: Abbr. |
| 48% | EPA | 3 | Pollution watchdog: Abbr. |
| 47% | BMI | 3 | Weight to height ratio: Abbr. |
| 47% | BMI | 3 | Dietitian's fitness ratio: Abbr. |
| 47% | BMI | 3 | Weight-to-height ratio: Abbr. |
| 46% | BMI | 3 | Ratio involving height and weight: Abbr. |
| 46% | EPA | 3 | Federal pollution watchdog: Abbr. |
| 46% | EPA | 3 | Government pollution watchdog: Abbr. |
| 46% | EPA | 3 | Air pollution watchdog: Abbr. |
| 46% | EPA | 3 | Water pollution watchdog: Abbr. |
| 44% | EPA | 3 | Organization that monitors pollution: Abbr. |
| 44% | EPA | 3 | Federal watchdog for pollution: Abbr. |
| 44% | EPA | 3 | Government monitor of pollution: Abbr. |
| 44% | EPA | 3 | Pollution-control agency with a flower logo: Abbr. |
| 44% | EPA | 3 | Pollution-monitoring group in the US government: Abbr. |
| 43% | EPA | 3 | Government body that monitors pollution: Abbr. |
| 43% | EPA | 3 | Government group that monitors pollution: Abbr. |
| 43% | EPA | 3 | Federal agency that monitors pollution: Abbr. |
| 43% | EPA | 3 | Federal group that monitors pollution: Abbr. |