Coal. Sample of the sedimentary rock coal, which primarily consists of the element carbon. The harder forms of coal are considered a form of metamorphic rock. Coal is formed from the conversion of plant matter to rock under pressure over many millions of years. The burning of coal produces carbon dioxide, a greenhouse gas that contributes to global warming. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4500 px × 4500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |