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Keywords:rivier, river, basalt, erosion, erosiebestrijding, naturalized, introduced, Lupinus nootkatensis, Nootka Lupin, Lupin, Lupine, Alaskalupine, wildernis, rough, ruig, pure, puur, untouched, ongerept, moss, vulcanic, vulkanisch, Iceland, IJsland, landscape, landschap, nature, natuur
