Soybean crayons and soya beans. Soybean crayons were developed in around 1993. They are a biodegradable environmentally-friendly alternative to paraffin wax used in traditional crayons. They are made from soya beans (Glycine max),shown in the background | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bond, Martin |
Bildgröße: | 5138 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |