| USA Land Area | Acres | Square miles | Area (Texas=1) | |
| Total | 3775m | 5,900,000 | 7.7 | |
| Crop land | 450m | 720,000 | 2.6 | |
| Pastures | 580m | 906,000 | 3.2 | |
| Urban land | 66m | 103,000 | 0.37 | |
| "Unusable" Land | 2700m | 4,171,000 | 5.7 | |
| Algae ponds | 60m | 90,000 | 0.3 | assuming 2,500 gal/acre |
| Algae at theoretical max | 10m | 15,000 | 0.15 | assuming 14,000 gal / acre |
| corn based ethanol | 560m | 900,000 | 3.2 | assuming 300-400 gal/acre |
| switchgrass today | 300m | 450,000 | 2 | |
| switchgrass ethanol at theoretical max | 114m | 178,000 | 0.5 |