Royalty-Free Carbon Dioxide Photos, dominant color: gray
- 3168x4752 Public Domain
- 5377x3584 Public Domain
- 4752x3168 Public Domain
- 5326x3555 Public Domain
- 5993x2187 Public Domain
- 4727x3109 Public Domain
- 3264x2448 Public Domain
- 3839x2099 Public Domain
- 3004x2353 Public Domain