Table 2.
Potential candidates to meet the PM2.5 and O3 target achievementa of the cities in PRD
| Scenario | NOx | SO2 | VOCs | Primary PM | Cost (billion yuan) | Economic benefit (billion yuan) | Benefit-to-cost ratio |
|---|---|---|---|---|---|---|---|
| 1 | 22% | 0% | 12% | 30% | 1.51 | 26.70 | 17.7 |
| 2 | 21% | 16% | 12% | 33% | 1.78 | 28.97 | 16.0 |
| 3 | 23% | 18% | 12% | 29% | 1.66 | 25.89 | 15.5 |
| 4 | 20% | 19% | 12% | 29% | 1.70 | 26.17 | 15.5 |
| 5 | 23% | 9% | 12% | 29% | 1.66 | 25.52 | 15.5 |
| 6 | 23% | 9% | 12% | 29% | 1.66 | 25.41 | 15.5 |
| 7 | 23% | 0% | 12% | 29% | 1.64 | 24.89 | 15.0 |
| 8 | 23% | 17% | 12% | 29% | 1.72 | 25.85 | 15.0 |
| 9 | 22% | 9% | 13% | 25% | 1.92 | 20.81 | 11.0 |
| 10 | 22% | 0% | 12% | 25% | 1.90 | 20.28 | 10.5 |
a
based on ABaCAS-OE; PM2.5-target: annual averaged concentration less than 35 μg m−3; O3-target: annual averaged concentration less than 80 ppb.