Algae on a pond surface in the Pocono Mountains,Pennsylvania,in spring. This can be a natural process,or it can be caused by an increase in nutrients from fertilizers and detergents | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gadomski, Michael P. |
Bildgröße: | 3404 px × 5135 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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