Burning biofuel log. The biofuel log is made of grass clippings and contains no petroleum-derived chemicals. It was developed by the Agricultural Research Service (ARS),part of the US Department of Agriculture (USDA) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Bildgröße: | 3449 px × 2551 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |