- glass windows: up to 900+ million
- house cats: 100 million
- traffic: up to 100 million
- electrical transmission lines: up to 174 million
- agriculture: 67 million
If wind power increases by a factor of ten, that would equal 2.5 million birds/year, or 5% of cat kills. Let's say someday all solar power equals that of wind turbines, that would be 10% of cat kills for solar/wind. Shouldn't we eliminate cats? Now.