| 1 | A | B | C |
| --- | --- | --- | --- |
| 2 | Environmental impact of wind power - Birds |  |  |
| 3 | Source | Estimated mortality (in millions) | Estimated deaths (per GWh) |
| 4 | Wind turbines | 0.02 – 0.57 | 0.269 |
| 5 | Aircraft | 0.08 | (n/a) |
| 6 | Nuclear power plants | 0 - 0.33 | 0 - 0.416 |
| 7 | Oilfield oil waste & waste water pits | 0.50 – 1 | (n/a) |
| 8 | Nuisance bird control kills (airports, agriculture, etc...) | 2 | (n/a) |
| 9 | Communication towers (cellular, radio, microwave) | 4 – 50 | (n/a) |
| 10 | Large communications towers (over 180', N. America) | 6.8 | (n/a) |
| 11 | Fossil fuel powerplants | 14 | 5.18 |
| 12 | Cars & trucks | 50 – 100 | (n/a) |
| 13 | Agriculture | 67 | (n/a) |
| 14 | Pesticide use | 72 | (n/a) |
| 15 | Hunting | 100 – 120 | (n/a) |
| 16 | Transmission lines (conventional powerplants) | 174 – 175 | (n/a) |
| 17 | Buildings and windows | 365 – 988 | (n/a) |
| 18 | Domestic and feral cats | 210 – 3,700 | (n/a) |

Question: How many birds are killed by cars and buildings?
Answer: 57 million birds are killed by cars and 365 to 988 million are killed by collisions with buildings annually.